[
 {
  "id": "kin-0",
  "topic": "kinematics",
  "problem": "A particle moves with initial velocity 10.4 m/s and constant acceleration 2.4 m/s^2 for 10.4 s. What is its displacement? Answer in meters.",
  "params": {
   "v0": 10.4,
   "a": 2.4,
   "t": 10.4
  },
  "answer": 237.95,
  "solution": "x = v0*t + 0.5*a*t^2 = 10.4*10.4 + 0.5*2.4*10.4^2 = 237.95 m"
 },
 {
  "id": "kin-1",
  "topic": "kinematics",
  "problem": "A particle moves with initial velocity 22.3 m/s and constant acceleration 6.8 m/s^2 for 5.7 s. What is its displacement? Answer in meters.",
  "params": {
   "v0": 22.3,
   "a": 6.8,
   "t": 5.7
  },
  "answer": 237.58,
  "solution": "x = v0*t + 0.5*a*t^2 = 22.3*5.7 + 0.5*6.8*5.7^2 = 237.58 m"
 },
 {
  "id": "kin-2",
  "topic": "kinematics",
  "problem": "A particle moves with initial velocity 7.0 m/s and constant acceleration 3.6 m/s^2 for 4.3 s. What is its displacement? Answer in meters.",
  "params": {
   "v0": 7.0,
   "a": 3.6,
   "t": 4.3
  },
  "answer": 63.38,
  "solution": "x = v0*t + 0.5*a*t^2 = 7.0*4.3 + 0.5*3.6*4.3^2 = 63.38 m"
 },
 {
  "id": "kin-3",
  "topic": "kinematics",
  "problem": "A particle moves with initial velocity 11.2 m/s and constant acceleration 5.4 m/s^2 for 7.3 s. What is its displacement? Answer in meters.",
  "params": {
   "v0": 11.2,
   "a": 5.4,
   "t": 7.3
  },
  "answer": 225.64,
  "solution": "x = v0*t + 0.5*a*t^2 = 11.2*7.3 + 0.5*5.4*7.3^2 = 225.64 m"
 },
 {
  "id": "kin-4",
  "topic": "kinematics",
  "problem": "A particle moves with initial velocity 28.5 m/s and constant acceleration 3.8 m/s^2 for 7.9 s. What is its displacement? Answer in meters.",
  "params": {
   "v0": 28.5,
   "a": 3.8,
   "t": 7.9
  },
  "answer": 343.73,
  "solution": "x = v0*t + 0.5*a*t^2 = 28.5*7.9 + 0.5*3.8*7.9^2 = 343.73 m"
 },
 {
  "id": "kin-5",
  "topic": "kinematics",
  "problem": "A particle moves with initial velocity 22.4 m/s and constant acceleration 7.5 m/s^2 for 4.2 s. What is its displacement? Answer in meters.",
  "params": {
   "v0": 22.4,
   "a": 7.5,
   "t": 4.2
  },
  "answer": 160.23,
  "solution": "x = v0*t + 0.5*a*t^2 = 22.4*4.2 + 0.5*7.5*4.2^2 = 160.23 m"
 },
 {
  "id": "kin-6",
  "topic": "kinematics",
  "problem": "A particle moves with initial velocity 17.8 m/s and constant acceleration 5.0 m/s^2 for 4.1 s. What is its displacement? Answer in meters.",
  "params": {
   "v0": 17.8,
   "a": 5.0,
   "t": 4.1
  },
  "answer": 115.0,
  "solution": "x = v0*t + 0.5*a*t^2 = 17.8*4.1 + 0.5*5.0*4.1^2 = 115.0 m"
 },
 {
  "id": "kin-7",
  "topic": "kinematics",
  "problem": "A particle moves with initial velocity 28.6 m/s and constant acceleration 2.7 m/s^2 for 9.4 s. What is its displacement? Answer in meters.",
  "params": {
   "v0": 28.6,
   "a": 2.7,
   "t": 9.4
  },
  "answer": 388.13,
  "solution": "x = v0*t + 0.5*a*t^2 = 28.6*9.4 + 0.5*2.7*9.4^2 = 388.13 m"
 },
 {
  "id": "kin-8",
  "topic": "kinematics",
  "problem": "A particle moves with initial velocity 3.9 m/s and constant acceleration 9.0 m/s^2 for 11.3 s. What is its displacement? Answer in meters.",
  "params": {
   "v0": 3.9,
   "a": 9.0,
   "t": 11.3
  },
  "answer": 618.68,
  "solution": "x = v0*t + 0.5*a*t^2 = 3.9*11.3 + 0.5*9.0*11.3^2 = 618.68 m"
 },
 {
  "id": "kin-9",
  "topic": "kinematics",
  "problem": "A particle moves with initial velocity 3.4 m/s and constant acceleration 2.5 m/s^2 for 9.5 s. What is its displacement? Answer in meters.",
  "params": {
   "v0": 3.4,
   "a": 2.5,
   "t": 9.5
  },
  "answer": 145.11,
  "solution": "x = v0*t + 0.5*a*t^2 = 3.4*9.5 + 0.5*2.5*9.5^2 = 145.11 m"
 },
 {
  "id": "kin-10",
  "topic": "kinematics",
  "problem": "A particle moves with initial velocity 28.4 m/s and constant acceleration 6.2 m/s^2 for 6.8 s. What is its displacement? Answer in meters.",
  "params": {
   "v0": 28.4,
   "a": 6.2,
   "t": 6.8
  },
  "answer": 336.46,
  "solution": "x = v0*t + 0.5*a*t^2 = 28.4*6.8 + 0.5*6.2*6.8^2 = 336.46 m"
 },
 {
  "id": "kin-11",
  "topic": "kinematics",
  "problem": "A particle moves with initial velocity 27.2 m/s and constant acceleration 1.7 m/s^2 for 7.5 s. What is its displacement? Answer in meters.",
  "params": {
   "v0": 27.2,
   "a": 1.7,
   "t": 7.5
  },
  "answer": 251.81,
  "solution": "x = v0*t + 0.5*a*t^2 = 27.2*7.5 + 0.5*1.7*7.5^2 = 251.81 m"
 },
 {
  "id": "kin-12",
  "topic": "kinematics",
  "problem": "A particle moves with initial velocity 15.1 m/s and constant acceleration 1.7 m/s^2 for 9.8 s. What is its displacement? Answer in meters.",
  "params": {
   "v0": 15.1,
   "a": 1.7,
   "t": 9.8
  },
  "answer": 229.61,
  "solution": "x = v0*t + 0.5*a*t^2 = 15.1*9.8 + 0.5*1.7*9.8^2 = 229.61 m"
 },
 {
  "id": "kin-13",
  "topic": "kinematics",
  "problem": "A particle moves with initial velocity 24.5 m/s and constant acceleration 1.2 m/s^2 for 4.7 s. What is its displacement? Answer in meters.",
  "params": {
   "v0": 24.5,
   "a": 1.2,
   "t": 4.7
  },
  "answer": 128.4,
  "solution": "x = v0*t + 0.5*a*t^2 = 24.5*4.7 + 0.5*1.2*4.7^2 = 128.4 m"
 },
 {
  "id": "kin-14",
  "topic": "kinematics",
  "problem": "A particle moves with initial velocity 6.1 m/s and constant acceleration 2.7 m/s^2 for 10.1 s. What is its displacement? Answer in meters.",
  "params": {
   "v0": 6.1,
   "a": 2.7,
   "t": 10.1
  },
  "answer": 199.32,
  "solution": "x = v0*t + 0.5*a*t^2 = 6.1*10.1 + 0.5*2.7*10.1^2 = 199.32 m"
 },
 {
  "id": "kin-15",
  "topic": "kinematics",
  "problem": "A particle moves with initial velocity 10.5 m/s and constant acceleration 1.6 m/s^2 for 2.5 s. What is its displacement? Answer in meters.",
  "params": {
   "v0": 10.5,
   "a": 1.6,
   "t": 2.5
  },
  "answer": 31.25,
  "solution": "x = v0*t + 0.5*a*t^2 = 10.5*2.5 + 0.5*1.6*2.5^2 = 31.25 m"
 },
 {
  "id": "kin-16",
  "topic": "kinematics",
  "problem": "A particle moves with initial velocity 27.0 m/s and constant acceleration 5.7 m/s^2 for 10.3 s. What is its displacement? Answer in meters.",
  "params": {
   "v0": 27.0,
   "a": 5.7,
   "t": 10.3
  },
  "answer": 580.46,
  "solution": "x = v0*t + 0.5*a*t^2 = 27.0*10.3 + 0.5*5.7*10.3^2 = 580.46 m"
 },
 {
  "id": "kin-17",
  "topic": "kinematics",
  "problem": "A particle moves with initial velocity 10.8 m/s and constant acceleration 8.0 m/s^2 for 4.0 s. What is its displacement? Answer in meters.",
  "params": {
   "v0": 10.8,
   "a": 8.0,
   "t": 4.0
  },
  "answer": 107.2,
  "solution": "x = v0*t + 0.5*a*t^2 = 10.8*4.0 + 0.5*8.0*4.0^2 = 107.2 m"
 },
 {
  "id": "kin-18",
  "topic": "kinematics",
  "problem": "A particle moves with initial velocity 9.0 m/s and constant acceleration 6.1 m/s^2 for 5.8 s. What is its displacement? Answer in meters.",
  "params": {
   "v0": 9.0,
   "a": 6.1,
   "t": 5.8
  },
  "answer": 154.8,
  "solution": "x = v0*t + 0.5*a*t^2 = 9.0*5.8 + 0.5*6.1*5.8^2 = 154.8 m"
 },
 {
  "id": "kin-19",
  "topic": "kinematics",
  "problem": "A particle moves with initial velocity 6.8 m/s and constant acceleration 6.5 m/s^2 for 3.9 s. What is its displacement? Answer in meters.",
  "params": {
   "v0": 6.8,
   "a": 6.5,
   "t": 3.9
  },
  "answer": 75.95,
  "solution": "x = v0*t + 0.5*a*t^2 = 6.8*3.9 + 0.5*6.5*3.9^2 = 75.95 m"
 },
 {
  "id": "kin-20",
  "topic": "kinematics",
  "problem": "A particle moves with initial velocity 2.4 m/s and constant acceleration 3.2 m/s^2 for 10.0 s. What is its displacement? Answer in meters.",
  "params": {
   "v0": 2.4,
   "a": 3.2,
   "t": 10.0
  },
  "answer": 184.0,
  "solution": "x = v0*t + 0.5*a*t^2 = 2.4*10.0 + 0.5*3.2*10.0^2 = 184.0 m"
 },
 {
  "id": "kin-21",
  "topic": "kinematics",
  "problem": "A particle moves with initial velocity 11.0 m/s and constant acceleration 2.5 m/s^2 for 7.3 s. What is its displacement? Answer in meters.",
  "params": {
   "v0": 11.0,
   "a": 2.5,
   "t": 7.3
  },
  "answer": 146.91,
  "solution": "x = v0*t + 0.5*a*t^2 = 11.0*7.3 + 0.5*2.5*7.3^2 = 146.91 m"
 },
 {
  "id": "kin-22",
  "topic": "kinematics",
  "problem": "A particle moves with initial velocity 19.9 m/s and constant acceleration 1.5 m/s^2 for 2.1 s. What is its displacement? Answer in meters.",
  "params": {
   "v0": 19.9,
   "a": 1.5,
   "t": 2.1
  },
  "answer": 45.1,
  "solution": "x = v0*t + 0.5*a*t^2 = 19.9*2.1 + 0.5*1.5*2.1^2 = 45.1 m"
 },
 {
  "id": "kin-23",
  "topic": "kinematics",
  "problem": "A particle moves with initial velocity 20.9 m/s and constant acceleration 8.7 m/s^2 for 2.9 s. What is its displacement? Answer in meters.",
  "params": {
   "v0": 20.9,
   "a": 8.7,
   "t": 2.9
  },
  "answer": 97.19,
  "solution": "x = v0*t + 0.5*a*t^2 = 20.9*2.9 + 0.5*8.7*2.9^2 = 97.19 m"
 },
 {
  "id": "kin-24",
  "topic": "kinematics",
  "problem": "A particle moves with initial velocity 3.8 m/s and constant acceleration 7.6 m/s^2 for 2.2 s. What is its displacement? Answer in meters.",
  "params": {
   "v0": 3.8,
   "a": 7.6,
   "t": 2.2
  },
  "answer": 26.75,
  "solution": "x = v0*t + 0.5*a*t^2 = 3.8*2.2 + 0.5*7.6*2.2^2 = 26.75 m"
 },
 {
  "id": "kin-25",
  "topic": "kinematics",
  "problem": "A particle moves with initial velocity 28.8 m/s and constant acceleration 5.2 m/s^2 for 3.6 s. What is its displacement? Answer in meters.",
  "params": {
   "v0": 28.8,
   "a": 5.2,
   "t": 3.6
  },
  "answer": 137.38,
  "solution": "x = v0*t + 0.5*a*t^2 = 28.8*3.6 + 0.5*5.2*3.6^2 = 137.38 m"
 },
 {
  "id": "kin-26",
  "topic": "kinematics",
  "problem": "A particle moves with initial velocity 17.9 m/s and constant acceleration 4.2 m/s^2 for 2.3 s. What is its displacement? Answer in meters.",
  "params": {
   "v0": 17.9,
   "a": 4.2,
   "t": 2.3
  },
  "answer": 52.28,
  "solution": "x = v0*t + 0.5*a*t^2 = 17.9*2.3 + 0.5*4.2*2.3^2 = 52.28 m"
 },
 {
  "id": "kin-27",
  "topic": "kinematics",
  "problem": "A particle moves with initial velocity 26.6 m/s and constant acceleration 5.5 m/s^2 for 4.3 s. What is its displacement? Answer in meters.",
  "params": {
   "v0": 26.6,
   "a": 5.5,
   "t": 4.3
  },
  "answer": 165.23,
  "solution": "x = v0*t + 0.5*a*t^2 = 26.6*4.3 + 0.5*5.5*4.3^2 = 165.23 m"
 },
 {
  "id": "kin-28",
  "topic": "kinematics",
  "problem": "A particle moves with initial velocity 8.4 m/s and constant acceleration 6.7 m/s^2 for 10.2 s. What is its displacement? Answer in meters.",
  "params": {
   "v0": 8.4,
   "a": 6.7,
   "t": 10.2
  },
  "answer": 434.21,
  "solution": "x = v0*t + 0.5*a*t^2 = 8.4*10.2 + 0.5*6.7*10.2^2 = 434.21 m"
 },
 {
  "id": "kin-29",
  "topic": "kinematics",
  "problem": "A particle moves with initial velocity 14.5 m/s and constant acceleration 1.3 m/s^2 for 7.6 s. What is its displacement? Answer in meters.",
  "params": {
   "v0": 14.5,
   "a": 1.3,
   "t": 7.6
  },
  "answer": 147.74,
  "solution": "x = v0*t + 0.5*a*t^2 = 14.5*7.6 + 0.5*1.3*7.6^2 = 147.74 m"
 },
 {
  "id": "kin-30",
  "topic": "kinematics",
  "problem": "A particle moves with initial velocity 24.1 m/s and constant acceleration 7.0 m/s^2 for 4.2 s. What is its displacement? Answer in meters.",
  "params": {
   "v0": 24.1,
   "a": 7.0,
   "t": 4.2
  },
  "answer": 162.96,
  "solution": "x = v0*t + 0.5*a*t^2 = 24.1*4.2 + 0.5*7.0*4.2^2 = 162.96 m"
 },
 {
  "id": "kin-31",
  "topic": "kinematics",
  "problem": "A particle moves with initial velocity 8.8 m/s and constant acceleration 3.6 m/s^2 for 2.8 s. What is its displacement? Answer in meters.",
  "params": {
   "v0": 8.8,
   "a": 3.6,
   "t": 2.8
  },
  "answer": 38.75,
  "solution": "x = v0*t + 0.5*a*t^2 = 8.8*2.8 + 0.5*3.6*2.8^2 = 38.75 m"
 },
 {
  "id": "kin-32",
  "topic": "kinematics",
  "problem": "A particle moves with initial velocity 18.7 m/s and constant acceleration 6.5 m/s^2 for 6.2 s. What is its displacement? Answer in meters.",
  "params": {
   "v0": 18.7,
   "a": 6.5,
   "t": 6.2
  },
  "answer": 240.87,
  "solution": "x = v0*t + 0.5*a*t^2 = 18.7*6.2 + 0.5*6.5*6.2^2 = 240.87 m"
 },
 {
  "id": "kin-33",
  "topic": "kinematics",
  "problem": "A particle moves with initial velocity 18.3 m/s and constant acceleration 7.5 m/s^2 for 9.8 s. What is its displacement? Answer in meters.",
  "params": {
   "v0": 18.3,
   "a": 7.5,
   "t": 9.8
  },
  "answer": 539.49,
  "solution": "x = v0*t + 0.5*a*t^2 = 18.3*9.8 + 0.5*7.5*9.8^2 = 539.49 m"
 },
 {
  "id": "kin-34",
  "topic": "kinematics",
  "problem": "A particle moves with initial velocity 28.8 m/s and constant acceleration 6.5 m/s^2 for 11.2 s. What is its displacement? Answer in meters.",
  "params": {
   "v0": 28.8,
   "a": 6.5,
   "t": 11.2
  },
  "answer": 730.24,
  "solution": "x = v0*t + 0.5*a*t^2 = 28.8*11.2 + 0.5*6.5*11.2^2 = 730.24 m"
 },
 {
  "id": "kin-35",
  "topic": "kinematics",
  "problem": "A particle moves with initial velocity 22.7 m/s and constant acceleration 5.9 m/s^2 for 7.3 s. What is its displacement? Answer in meters.",
  "params": {
   "v0": 22.7,
   "a": 5.9,
   "t": 7.3
  },
  "answer": 322.92,
  "solution": "x = v0*t + 0.5*a*t^2 = 22.7*7.3 + 0.5*5.9*7.3^2 = 322.92 m"
 },
 {
  "id": "kin-36",
  "topic": "kinematics",
  "problem": "A particle moves with initial velocity 18.0 m/s and constant acceleration 2.9 m/s^2 for 6.3 s. What is its displacement? Answer in meters.",
  "params": {
   "v0": 18.0,
   "a": 2.9,
   "t": 6.3
  },
  "answer": 170.95,
  "solution": "x = v0*t + 0.5*a*t^2 = 18.0*6.3 + 0.5*2.9*6.3^2 = 170.95 m"
 },
 {
  "id": "kin-37",
  "topic": "kinematics",
  "problem": "A particle moves with initial velocity 26.7 m/s and constant acceleration 2.5 m/s^2 for 7.0 s. What is its displacement? Answer in meters.",
  "params": {
   "v0": 26.7,
   "a": 2.5,
   "t": 7.0
  },
  "answer": 248.15,
  "solution": "x = v0*t + 0.5*a*t^2 = 26.7*7.0 + 0.5*2.5*7.0^2 = 248.15 m"
 },
 {
  "id": "kin-38",
  "topic": "kinematics",
  "problem": "A particle moves with initial velocity 8.5 m/s and constant acceleration 5.3 m/s^2 for 2.8 s. What is its displacement? Answer in meters.",
  "params": {
   "v0": 8.5,
   "a": 5.3,
   "t": 2.8
  },
  "answer": 44.58,
  "solution": "x = v0*t + 0.5*a*t^2 = 8.5*2.8 + 0.5*5.3*2.8^2 = 44.58 m"
 },
 {
  "id": "kin-39",
  "topic": "kinematics",
  "problem": "A particle moves with initial velocity 10.9 m/s and constant acceleration 6.5 m/s^2 for 7.9 s. What is its displacement? Answer in meters.",
  "params": {
   "v0": 10.9,
   "a": 6.5,
   "t": 7.9
  },
  "answer": 288.94,
  "solution": "x = v0*t + 0.5*a*t^2 = 10.9*7.9 + 0.5*6.5*7.9^2 = 288.94 m"
 },
 {
  "id": "en-0",
  "topic": "energy",
  "problem": "A 75.5 kg object is raised 79.2 m at standard gravity (g=9.81). What is its gravitational potential energy? Answer in joules.",
  "params": {
   "m": 75.5,
   "h": 79.2,
   "g": 9.81
  },
  "answer": 58659.88,
  "solution": "PE = m*g*h = 75.5*9.81*79.2 = 58659.88 J"
 },
 {
  "id": "en-1",
  "topic": "energy",
  "problem": "A 62.4 kg object is raised 31.8 m at standard gravity (g=9.81). What is its gravitational potential energy? Answer in joules.",
  "params": {
   "m": 62.4,
   "h": 31.8,
   "g": 9.81
  },
  "answer": 19466.18,
  "solution": "PE = m*g*h = 62.4*9.81*31.8 = 19466.18 J"
 },
 {
  "id": "en-2",
  "topic": "energy",
  "problem": "A 42.2 kg object is raised 29.5 m at standard gravity (g=9.81). What is its gravitational potential energy? Answer in joules.",
  "params": {
   "m": 42.2,
   "h": 29.5,
   "g": 9.81
  },
  "answer": 12212.47,
  "solution": "PE = m*g*h = 42.2*9.81*29.5 = 12212.47 J"
 },
 {
  "id": "en-3",
  "topic": "energy",
  "problem": "A 65.1 kg object is raised 86.1 m at standard gravity (g=9.81). What is its gravitational potential energy? Answer in joules.",
  "params": {
   "m": 65.1,
   "h": 86.1,
   "g": 9.81
  },
  "answer": 54986.13,
  "solution": "PE = m*g*h = 65.1*9.81*86.1 = 54986.13 J"
 },
 {
  "id": "en-4",
  "topic": "energy",
  "problem": "A 18.2 kg object is raised 5.7 m at standard gravity (g=9.81). What is its gravitational potential energy? Answer in joules.",
  "params": {
   "m": 18.2,
   "h": 5.7,
   "g": 9.81
  },
  "answer": 1017.69,
  "solution": "PE = m*g*h = 18.2*9.81*5.7 = 1017.69 J"
 },
 {
  "id": "en-5",
  "topic": "energy",
  "problem": "A 25.3 kg object is raised 91.8 m at standard gravity (g=9.81). What is its gravitational potential energy? Answer in joules.",
  "params": {
   "m": 25.3,
   "h": 91.8,
   "g": 9.81
  },
  "answer": 22784.12,
  "solution": "PE = m*g*h = 25.3*9.81*91.8 = 22784.12 J"
 },
 {
  "id": "en-6",
  "topic": "energy",
  "problem": "A 55.5 kg object is raised 16.9 m at standard gravity (g=9.81). What is its gravitational potential energy? Answer in joules.",
  "params": {
   "m": 55.5,
   "h": 16.9,
   "g": 9.81
  },
  "answer": 9201.29,
  "solution": "PE = m*g*h = 55.5*9.81*16.9 = 9201.29 J"
 },
 {
  "id": "en-7",
  "topic": "energy",
  "problem": "A 53.6 kg object is raised 42.8 m at standard gravity (g=9.81). What is its gravitational potential energy? Answer in joules.",
  "params": {
   "m": 53.6,
   "h": 42.8,
   "g": 9.81
  },
  "answer": 22504.92,
  "solution": "PE = m*g*h = 53.6*9.81*42.8 = 22504.92 J"
 },
 {
  "id": "en-8",
  "topic": "energy",
  "problem": "A 19.5 kg object is raised 47.6 m at standard gravity (g=9.81). What is its gravitational potential energy? Answer in joules.",
  "params": {
   "m": 19.5,
   "h": 47.6,
   "g": 9.81
  },
  "answer": 9105.64,
  "solution": "PE = m*g*h = 19.5*9.81*47.6 = 9105.64 J"
 },
 {
  "id": "en-9",
  "topic": "energy",
  "problem": "A 41.1 kg object is raised 59.2 m at standard gravity (g=9.81). What is its gravitational potential energy? Answer in joules.",
  "params": {
   "m": 41.1,
   "h": 59.2,
   "g": 9.81
  },
  "answer": 23868.91,
  "solution": "PE = m*g*h = 41.1*9.81*59.2 = 23868.91 J"
 },
 {
  "id": "en-10",
  "topic": "energy",
  "problem": "A 59.6 kg object is raised 48.3 m at standard gravity (g=9.81). What is its gravitational potential energy? Answer in joules.",
  "params": {
   "m": 59.6,
   "h": 48.3,
   "g": 9.81
  },
  "answer": 28239.85,
  "solution": "PE = m*g*h = 59.6*9.81*48.3 = 28239.85 J"
 },
 {
  "id": "en-11",
  "topic": "energy",
  "problem": "A 40.4 kg object is raised 105.6 m at standard gravity (g=9.81). What is its gravitational potential energy? Answer in joules.",
  "params": {
   "m": 40.4,
   "h": 105.6,
   "g": 9.81
  },
  "answer": 41851.81,
  "solution": "PE = m*g*h = 40.4*9.81*105.6 = 41851.81 J"
 },
 {
  "id": "en-12",
  "topic": "energy",
  "problem": "A 36.9 kg object is raised 10.4 m at standard gravity (g=9.81). What is its gravitational potential energy? Answer in joules.",
  "params": {
   "m": 36.9,
   "h": 10.4,
   "g": 9.81
  },
  "answer": 3764.69,
  "solution": "PE = m*g*h = 36.9*9.81*10.4 = 3764.69 J"
 },
 {
  "id": "en-13",
  "topic": "energy",
  "problem": "A 0.6 kg object is raised 93.0 m at standard gravity (g=9.81). What is its gravitational potential energy? Answer in joules.",
  "params": {
   "m": 0.6,
   "h": 93.0,
   "g": 9.81
  },
  "answer": 547.4,
  "solution": "PE = m*g*h = 0.6*9.81*93.0 = 547.4 J"
 },
 {
  "id": "en-14",
  "topic": "energy",
  "problem": "A 59.8 kg object is raised 93.7 m at standard gravity (g=9.81). What is its gravitational potential energy? Answer in joules.",
  "params": {
   "m": 59.8,
   "h": 93.7,
   "g": 9.81
  },
  "answer": 54967.98,
  "solution": "PE = m*g*h = 59.8*9.81*93.7 = 54967.98 J"
 },
 {
  "id": "en-15",
  "topic": "energy",
  "problem": "A 61.0 kg object is raised 45.7 m at standard gravity (g=9.81). What is its gravitational potential energy? Answer in joules.",
  "params": {
   "m": 61.0,
   "h": 45.7,
   "g": 9.81
  },
  "answer": 27347.34,
  "solution": "PE = m*g*h = 61.0*9.81*45.7 = 27347.34 J"
 },
 {
  "id": "en-16",
  "topic": "energy",
  "problem": "A 58.7 kg object is raised 102.3 m at standard gravity (g=9.81). What is its gravitational potential energy? Answer in joules.",
  "params": {
   "m": 58.7,
   "h": 102.3,
   "g": 9.81
  },
  "answer": 58909.15,
  "solution": "PE = m*g*h = 58.7*9.81*102.3 = 58909.15 J"
 },
 {
  "id": "en-17",
  "topic": "energy",
  "problem": "A 59.5 kg object is raised 97.2 m at standard gravity (g=9.81). What is its gravitational potential energy? Answer in joules.",
  "params": {
   "m": 59.5,
   "h": 97.2,
   "g": 9.81
  },
  "answer": 56735.15,
  "solution": "PE = m*g*h = 59.5*9.81*97.2 = 56735.15 J"
 },
 {
  "id": "en-18",
  "topic": "energy",
  "problem": "A 64.7 kg object is raised 18.3 m at standard gravity (g=9.81). What is its gravitational potential energy? Answer in joules.",
  "params": {
   "m": 64.7,
   "h": 18.3,
   "g": 9.81
  },
  "answer": 11615.14,
  "solution": "PE = m*g*h = 64.7*9.81*18.3 = 11615.14 J"
 },
 {
  "id": "en-19",
  "topic": "energy",
  "problem": "A 49.2 kg object is raised 53.7 m at standard gravity (g=9.81). What is its gravitational potential energy? Answer in joules.",
  "params": {
   "m": 49.2,
   "h": 53.7,
   "g": 9.81
  },
  "answer": 25918.41,
  "solution": "PE = m*g*h = 49.2*9.81*53.7 = 25918.41 J"
 },
 {
  "id": "en-20",
  "topic": "energy",
  "problem": "A 16.1 kg object is raised 51.2 m at standard gravity (g=9.81). What is its gravitational potential energy? Answer in joules.",
  "params": {
   "m": 16.1,
   "h": 51.2,
   "g": 9.81
  },
  "answer": 8086.58,
  "solution": "PE = m*g*h = 16.1*9.81*51.2 = 8086.58 J"
 },
 {
  "id": "en-21",
  "topic": "energy",
  "problem": "A 43.4 kg object is raised 14.9 m at standard gravity (g=9.81). What is its gravitational potential energy? Answer in joules.",
  "params": {
   "m": 43.4,
   "h": 14.9,
   "g": 9.81
  },
  "answer": 6343.73,
  "solution": "PE = m*g*h = 43.4*9.81*14.9 = 6343.73 J"
 },
 {
  "id": "en-22",
  "topic": "energy",
  "problem": "A 10.8 kg object is raised 103.2 m at standard gravity (g=9.81). What is its gravitational potential energy? Answer in joules.",
  "params": {
   "m": 10.8,
   "h": 103.2,
   "g": 9.81
  },
  "answer": 10933.83,
  "solution": "PE = m*g*h = 10.8*9.81*103.2 = 10933.83 J"
 },
 {
  "id": "en-23",
  "topic": "energy",
  "problem": "A 35.2 kg object is raised 81.2 m at standard gravity (g=9.81). What is its gravitational potential energy? Answer in joules.",
  "params": {
   "m": 35.2,
   "h": 81.2,
   "g": 9.81
  },
  "answer": 28039.33,
  "solution": "PE = m*g*h = 35.2*9.81*81.2 = 28039.33 J"
 },
 {
  "id": "en-24",
  "topic": "energy",
  "problem": "A 60.5 kg object is raised 20.8 m at standard gravity (g=9.81). What is its gravitational potential energy? Answer in joules.",
  "params": {
   "m": 60.5,
   "h": 20.8,
   "g": 9.81
  },
  "answer": 12344.9,
  "solution": "PE = m*g*h = 60.5*9.81*20.8 = 12344.9 J"
 },
 {
  "id": "en-25",
  "topic": "energy",
  "problem": "A 75.0 kg object is raised 30.3 m at standard gravity (g=9.81). What is its gravitational potential energy? Answer in joules.",
  "params": {
   "m": 75.0,
   "h": 30.3,
   "g": 9.81
  },
  "answer": 22293.23,
  "solution": "PE = m*g*h = 75.0*9.81*30.3 = 22293.23 J"
 },
 {
  "id": "en-26",
  "topic": "energy",
  "problem": "A 48.6 kg object is raised 24.8 m at standard gravity (g=9.81). What is its gravitational potential energy? Answer in joules.",
  "params": {
   "m": 48.6,
   "h": 24.8,
   "g": 9.81
  },
  "answer": 11823.8,
  "solution": "PE = m*g*h = 48.6*9.81*24.8 = 11823.8 J"
 },
 {
  "id": "en-27",
  "topic": "energy",
  "problem": "A 76.5 kg object is raised 48.3 m at standard gravity (g=9.81). What is its gravitational potential energy? Answer in joules.",
  "params": {
   "m": 76.5,
   "h": 48.3,
   "g": 9.81
  },
  "answer": 36247.46,
  "solution": "PE = m*g*h = 76.5*9.81*48.3 = 36247.46 J"
 },
 {
  "id": "en-28",
  "topic": "energy",
  "problem": "A 67.1 kg object is raised 114.3 m at standard gravity (g=9.81). What is its gravitational potential energy? Answer in joules.",
  "params": {
   "m": 67.1,
   "h": 114.3,
   "g": 9.81
  },
  "answer": 75238.09,
  "solution": "PE = m*g*h = 67.1*9.81*114.3 = 75238.09 J"
 },
 {
  "id": "en-29",
  "topic": "energy",
  "problem": "A 10.1 kg object is raised 108.0 m at standard gravity (g=9.81). What is its gravitational potential energy? Answer in joules.",
  "params": {
   "m": 10.1,
   "h": 108.0,
   "g": 9.81
  },
  "answer": 10700.75,
  "solution": "PE = m*g*h = 10.1*9.81*108.0 = 10700.75 J"
 },
 {
  "id": "en-30",
  "topic": "energy",
  "problem": "A 60.0 kg object is raised 100.3 m at standard gravity (g=9.81). What is its gravitational potential energy? Answer in joules.",
  "params": {
   "m": 60.0,
   "h": 100.3,
   "g": 9.81
  },
  "answer": 59036.58,
  "solution": "PE = m*g*h = 60.0*9.81*100.3 = 59036.58 J"
 },
 {
  "id": "en-31",
  "topic": "energy",
  "problem": "A 9.7 kg object is raised 59.4 m at standard gravity (g=9.81). What is its gravitational potential energy? Answer in joules.",
  "params": {
   "m": 9.7,
   "h": 59.4,
   "g": 9.81
  },
  "answer": 5652.33,
  "solution": "PE = m*g*h = 9.7*9.81*59.4 = 5652.33 J"
 },
 {
  "id": "en-32",
  "topic": "energy",
  "problem": "A 65.4 kg object is raised 87.5 m at standard gravity (g=9.81). What is its gravitational potential energy? Answer in joules.",
  "params": {
   "m": 65.4,
   "h": 87.5,
   "g": 9.81
  },
  "answer": 56137.73,
  "solution": "PE = m*g*h = 65.4*9.81*87.5 = 56137.73 J"
 },
 {
  "id": "en-33",
  "topic": "energy",
  "problem": "A 22.9 kg object is raised 101.6 m at standard gravity (g=9.81). What is its gravitational potential energy? Answer in joules.",
  "params": {
   "m": 22.9,
   "h": 101.6,
   "g": 9.81
  },
  "answer": 22824.34,
  "solution": "PE = m*g*h = 22.9*9.81*101.6 = 22824.34 J"
 },
 {
  "id": "en-34",
  "topic": "energy",
  "problem": "A 16.2 kg object is raised 20.9 m at standard gravity (g=9.81). What is its gravitational potential energy? Answer in joules.",
  "params": {
   "m": 16.2,
   "h": 20.9,
   "g": 9.81
  },
  "answer": 3321.47,
  "solution": "PE = m*g*h = 16.2*9.81*20.9 = 3321.47 J"
 },
 {
  "id": "en-35",
  "topic": "energy",
  "problem": "A 68.5 kg object is raised 64.2 m at standard gravity (g=9.81). What is its gravitational potential energy? Answer in joules.",
  "params": {
   "m": 68.5,
   "h": 64.2,
   "g": 9.81
  },
  "answer": 43141.44,
  "solution": "PE = m*g*h = 68.5*9.81*64.2 = 43141.44 J"
 },
 {
  "id": "en-36",
  "topic": "energy",
  "problem": "A 7.6 kg object is raised 56.4 m at standard gravity (g=9.81). What is its gravitational potential energy? Answer in joules.",
  "params": {
   "m": 7.6,
   "h": 56.4,
   "g": 9.81
  },
  "answer": 4204.96,
  "solution": "PE = m*g*h = 7.6*9.81*56.4 = 4204.96 J"
 },
 {
  "id": "en-37",
  "topic": "energy",
  "problem": "A 58.2 kg object is raised 119.2 m at standard gravity (g=9.81). What is its gravitational potential energy? Answer in joules.",
  "params": {
   "m": 58.2,
   "h": 119.2,
   "g": 9.81
  },
  "answer": 68056.29,
  "solution": "PE = m*g*h = 58.2*9.81*119.2 = 68056.29 J"
 },
 {
  "id": "en-38",
  "topic": "energy",
  "problem": "A 2.9 kg object is raised 89.1 m at standard gravity (g=9.81). What is its gravitational potential energy? Answer in joules.",
  "params": {
   "m": 2.9,
   "h": 89.1,
   "g": 9.81
  },
  "answer": 2534.81,
  "solution": "PE = m*g*h = 2.9*9.81*89.1 = 2534.81 J"
 },
 {
  "id": "en-39",
  "topic": "energy",
  "problem": "A 43.1 kg object is raised 115.9 m at standard gravity (g=9.81). What is its gravitational potential energy? Answer in joules.",
  "params": {
   "m": 43.1,
   "h": 115.9,
   "g": 9.81
  },
  "answer": 49003.79,
  "solution": "PE = m*g*h = 43.1*9.81*115.9 = 49003.79 J"
 },
 {
  "id": "cir-0",
  "topic": "circuits",
  "problem": "A 9.7 V source drives two resistors in parallel: 299 ohm and 469 ohm. What total current flows? Answer in amperes, 4 decimals.",
  "params": {
   "v": 9.7,
   "r1": 299,
   "r2": 469
  },
  "answer": 0.0531,
  "solution": "Rp = 299*469/(299+469) = 182.59 ohm; I = V/Rp = 9.7/182.59 = 0.0531 A"
 },
 {
  "id": "cir-1",
  "topic": "circuits",
  "problem": "A 7.0 V source drives two resistors in parallel: 380 ohm and 324 ohm. What total current flows? Answer in amperes, 4 decimals.",
  "params": {
   "v": 7.0,
   "r1": 380,
   "r2": 324
  },
  "answer": 0.04,
  "solution": "Rp = 380*324/(380+324) = 174.89 ohm; I = V/Rp = 7.0/174.89 = 0.04 A"
 },
 {
  "id": "cir-2",
  "topic": "circuits",
  "problem": "A 16.4 V source drives two resistors in parallel: 356 ohm and 290 ohm. What total current flows? Answer in amperes, 4 decimals.",
  "params": {
   "v": 16.4,
   "r1": 356,
   "r2": 290
  },
  "answer": 0.1026,
  "solution": "Rp = 356*290/(356+290) = 159.81 ohm; I = V/Rp = 16.4/159.81 = 0.1026 A"
 },
 {
  "id": "cir-3",
  "topic": "circuits",
  "problem": "A 16.2 V source drives two resistors in parallel: 219 ohm and 99 ohm. What total current flows? Answer in amperes, 4 decimals.",
  "params": {
   "v": 16.2,
   "r1": 219,
   "r2": 99
  },
  "answer": 0.2376,
  "solution": "Rp = 219*99/(219+99) = 68.18 ohm; I = V/Rp = 16.2/68.18 = 0.2376 A"
 },
 {
  "id": "cir-4",
  "topic": "circuits",
  "problem": "A 14.2 V source drives two resistors in parallel: 386 ohm and 286 ohm. What total current flows? Answer in amperes, 4 decimals.",
  "params": {
   "v": 14.2,
   "r1": 386,
   "r2": 286
  },
  "answer": 0.0864,
  "solution": "Rp = 386*286/(386+286) = 164.28 ohm; I = V/Rp = 14.2/164.28 = 0.0864 A"
 },
 {
  "id": "cir-5",
  "topic": "circuits",
  "problem": "A 6.6 V source drives two resistors in parallel: 179 ohm and 95 ohm. What total current flows? Answer in amperes, 4 decimals.",
  "params": {
   "v": 6.6,
   "r1": 179,
   "r2": 95
  },
  "answer": 0.1063,
  "solution": "Rp = 179*95/(179+95) = 62.06 ohm; I = V/Rp = 6.6/62.06 = 0.1063 A"
 },
 {
  "id": "cir-6",
  "topic": "circuits",
  "problem": "A 22.1 V source drives two resistors in parallel: 38 ohm and 498 ohm. What total current flows? Answer in amperes, 4 decimals.",
  "params": {
   "v": 22.1,
   "r1": 38,
   "r2": 498
  },
  "answer": 0.6259,
  "solution": "Rp = 38*498/(38+498) = 35.31 ohm; I = V/Rp = 22.1/35.31 = 0.6259 A"
 },
 {
  "id": "cir-7",
  "topic": "circuits",
  "problem": "A 14.7 V source drives two resistors in parallel: 266 ohm and 193 ohm. What total current flows? Answer in amperes, 4 decimals.",
  "params": {
   "v": 14.7,
   "r1": 266,
   "r2": 193
  },
  "answer": 0.1314,
  "solution": "Rp = 266*193/(266+193) = 111.85 ohm; I = V/Rp = 14.7/111.85 = 0.1314 A"
 },
 {
  "id": "cir-8",
  "topic": "circuits",
  "problem": "A 14.7 V source drives two resistors in parallel: 63 ohm and 404 ohm. What total current flows? Answer in amperes, 4 decimals.",
  "params": {
   "v": 14.7,
   "r1": 63,
   "r2": 404
  },
  "answer": 0.2697,
  "solution": "Rp = 63*404/(63+404) = 54.5 ohm; I = V/Rp = 14.7/54.5 = 0.2697 A"
 },
 {
  "id": "cir-9",
  "topic": "circuits",
  "problem": "A 8.2 V source drives two resistors in parallel: 463 ohm and 148 ohm. What total current flows? Answer in amperes, 4 decimals.",
  "params": {
   "v": 8.2,
   "r1": 463,
   "r2": 148
  },
  "answer": 0.0731,
  "solution": "Rp = 463*148/(463+148) = 112.15 ohm; I = V/Rp = 8.2/112.15 = 0.0731 A"
 },
 {
  "id": "cir-10",
  "topic": "circuits",
  "problem": "A 10.4 V source drives two resistors in parallel: 251 ohm and 15 ohm. What total current flows? Answer in amperes, 4 decimals.",
  "params": {
   "v": 10.4,
   "r1": 251,
   "r2": 15
  },
  "answer": 0.735,
  "solution": "Rp = 251*15/(251+15) = 14.15 ohm; I = V/Rp = 10.4/14.15 = 0.735 A"
 },
 {
  "id": "cir-11",
  "topic": "circuits",
  "problem": "A 5.8 V source drives two resistors in parallel: 335 ohm and 456 ohm. What total current flows? Answer in amperes, 4 decimals.",
  "params": {
   "v": 5.8,
   "r1": 335,
   "r2": 456
  },
  "answer": 0.03,
  "solution": "Rp = 335*456/(335+456) = 193.12 ohm; I = V/Rp = 5.8/193.12 = 0.03 A"
 },
 {
  "id": "cir-12",
  "topic": "circuits",
  "problem": "A 11.2 V source drives two resistors in parallel: 289 ohm and 278 ohm. What total current flows? Answer in amperes, 4 decimals.",
  "params": {
   "v": 11.2,
   "r1": 289,
   "r2": 278
  },
  "answer": 0.079,
  "solution": "Rp = 289*278/(289+278) = 141.7 ohm; I = V/Rp = 11.2/141.7 = 0.079 A"
 },
 {
  "id": "cir-13",
  "topic": "circuits",
  "problem": "A 19.8 V source drives two resistors in parallel: 470 ohm and 156 ohm. What total current flows? Answer in amperes, 4 decimals.",
  "params": {
   "v": 19.8,
   "r1": 470,
   "r2": 156
  },
  "answer": 0.1691,
  "solution": "Rp = 470*156/(470+156) = 117.12 ohm; I = V/Rp = 19.8/117.12 = 0.1691 A"
 },
 {
  "id": "cir-14",
  "topic": "circuits",
  "problem": "A 6.6 V source drives two resistors in parallel: 454 ohm and 176 ohm. What total current flows? Answer in amperes, 4 decimals.",
  "params": {
   "v": 6.6,
   "r1": 454,
   "r2": 176
  },
  "answer": 0.052,
  "solution": "Rp = 454*176/(454+176) = 126.83 ohm; I = V/Rp = 6.6/126.83 = 0.052 A"
 },
 {
  "id": "cir-15",
  "topic": "circuits",
  "problem": "A 12.4 V source drives two resistors in parallel: 142 ohm and 377 ohm. What total current flows? Answer in amperes, 4 decimals.",
  "params": {
   "v": 12.4,
   "r1": 142,
   "r2": 377
  },
  "answer": 0.1202,
  "solution": "Rp = 142*377/(142+377) = 103.15 ohm; I = V/Rp = 12.4/103.15 = 0.1202 A"
 },
 {
  "id": "cir-16",
  "topic": "circuits",
  "problem": "A 17.6 V source drives two resistors in parallel: 199 ohm and 406 ohm. What total current flows? Answer in amperes, 4 decimals.",
  "params": {
   "v": 17.6,
   "r1": 199,
   "r2": 406
  },
  "answer": 0.1318,
  "solution": "Rp = 199*406/(199+406) = 133.54 ohm; I = V/Rp = 17.6/133.54 = 0.1318 A"
 },
 {
  "id": "cir-17",
  "topic": "circuits",
  "problem": "A 22.2 V source drives two resistors in parallel: 249 ohm and 434 ohm. What total current flows? Answer in amperes, 4 decimals.",
  "params": {
   "v": 22.2,
   "r1": 249,
   "r2": 434
  },
  "answer": 0.1403,
  "solution": "Rp = 249*434/(249+434) = 158.22 ohm; I = V/Rp = 22.2/158.22 = 0.1403 A"
 },
 {
  "id": "cir-18",
  "topic": "circuits",
  "problem": "A 3.3 V source drives two resistors in parallel: 412 ohm and 11 ohm. What total current flows? Answer in amperes, 4 decimals.",
  "params": {
   "v": 3.3,
   "r1": 412,
   "r2": 11
  },
  "answer": 0.3081,
  "solution": "Rp = 412*11/(412+11) = 10.71 ohm; I = V/Rp = 3.3/10.71 = 0.3081 A"
 },
 {
  "id": "cir-19",
  "topic": "circuits",
  "problem": "A 14.9 V source drives two resistors in parallel: 54 ohm and 250 ohm. What total current flows? Answer in amperes, 4 decimals.",
  "params": {
   "v": 14.9,
   "r1": 54,
   "r2": 250
  },
  "answer": 0.3355,
  "solution": "Rp = 54*250/(54+250) = 44.41 ohm; I = V/Rp = 14.9/44.41 = 0.3355 A"
 },
 {
  "id": "cir-20",
  "topic": "circuits",
  "problem": "A 6.7 V source drives two resistors in parallel: 86 ohm and 458 ohm. What total current flows? Answer in amperes, 4 decimals.",
  "params": {
   "v": 6.7,
   "r1": 86,
   "r2": 458
  },
  "answer": 0.0925,
  "solution": "Rp = 86*458/(86+458) = 72.4 ohm; I = V/Rp = 6.7/72.4 = 0.0925 A"
 },
 {
  "id": "cir-21",
  "topic": "circuits",
  "problem": "A 11.6 V source drives two resistors in parallel: 297 ohm and 60 ohm. What total current flows? Answer in amperes, 4 decimals.",
  "params": {
   "v": 11.6,
   "r1": 297,
   "r2": 60
  },
  "answer": 0.2324,
  "solution": "Rp = 297*60/(297+60) = 49.92 ohm; I = V/Rp = 11.6/49.92 = 0.2324 A"
 },
 {
  "id": "cir-22",
  "topic": "circuits",
  "problem": "A 15.6 V source drives two resistors in parallel: 479 ohm and 184 ohm. What total current flows? Answer in amperes, 4 decimals.",
  "params": {
   "v": 15.6,
   "r1": 479,
   "r2": 184
  },
  "answer": 0.1173,
  "solution": "Rp = 479*184/(479+184) = 132.94 ohm; I = V/Rp = 15.6/132.94 = 0.1173 A"
 },
 {
  "id": "cir-23",
  "topic": "circuits",
  "problem": "A 22.9 V source drives two resistors in parallel: 177 ohm and 260 ohm. What total current flows? Answer in amperes, 4 decimals.",
  "params": {
   "v": 22.9,
   "r1": 177,
   "r2": 260
  },
  "answer": 0.2175,
  "solution": "Rp = 177*260/(177+260) = 105.31 ohm; I = V/Rp = 22.9/105.31 = 0.2175 A"
 },
 {
  "id": "cir-24",
  "topic": "circuits",
  "problem": "A 21.4 V source drives two resistors in parallel: 144 ohm and 172 ohm. What total current flows? Answer in amperes, 4 decimals.",
  "params": {
   "v": 21.4,
   "r1": 144,
   "r2": 172
  },
  "answer": 0.273,
  "solution": "Rp = 144*172/(144+172) = 78.38 ohm; I = V/Rp = 21.4/78.38 = 0.273 A"
 },
 {
  "id": "cir-25",
  "topic": "circuits",
  "problem": "A 12.1 V source drives two resistors in parallel: 56 ohm and 20 ohm. What total current flows? Answer in amperes, 4 decimals.",
  "params": {
   "v": 12.1,
   "r1": 56,
   "r2": 20
  },
  "answer": 0.8209,
  "solution": "Rp = 56*20/(56+20) = 14.74 ohm; I = V/Rp = 12.1/14.74 = 0.8209 A"
 },
 {
  "id": "cir-26",
  "topic": "circuits",
  "problem": "A 21.8 V source drives two resistors in parallel: 401 ohm and 252 ohm. What total current flows? Answer in amperes, 4 decimals.",
  "params": {
   "v": 21.8,
   "r1": 401,
   "r2": 252
  },
  "answer": 0.1409,
  "solution": "Rp = 401*252/(401+252) = 154.75 ohm; I = V/Rp = 21.8/154.75 = 0.1409 A"
 },
 {
  "id": "cir-27",
  "topic": "circuits",
  "problem": "A 7.5 V source drives two resistors in parallel: 377 ohm and 330 ohm. What total current flows? Answer in amperes, 4 decimals.",
  "params": {
   "v": 7.5,
   "r1": 377,
   "r2": 330
  },
  "answer": 0.0426,
  "solution": "Rp = 377*330/(377+330) = 175.97 ohm; I = V/Rp = 7.5/175.97 = 0.0426 A"
 },
 {
  "id": "cir-28",
  "topic": "circuits",
  "problem": "A 3.7 V source drives two resistors in parallel: 63 ohm and 298 ohm. What total current flows? Answer in amperes, 4 decimals.",
  "params": {
   "v": 3.7,
   "r1": 63,
   "r2": 298
  },
  "answer": 0.0711,
  "solution": "Rp = 63*298/(63+298) = 52.01 ohm; I = V/Rp = 3.7/52.01 = 0.0711 A"
 },
 {
  "id": "cir-29",
  "topic": "circuits",
  "problem": "A 9.7 V source drives two resistors in parallel: 223 ohm and 473 ohm. What total current flows? Answer in amperes, 4 decimals.",
  "params": {
   "v": 9.7,
   "r1": 223,
   "r2": 473
  },
  "answer": 0.064,
  "solution": "Rp = 223*473/(223+473) = 151.55 ohm; I = V/Rp = 9.7/151.55 = 0.064 A"
 },
 {
  "id": "cir-30",
  "topic": "circuits",
  "problem": "A 15.5 V source drives two resistors in parallel: 181 ohm and 174 ohm. What total current flows? Answer in amperes, 4 decimals.",
  "params": {
   "v": 15.5,
   "r1": 181,
   "r2": 174
  },
  "answer": 0.1747,
  "solution": "Rp = 181*174/(181+174) = 88.72 ohm; I = V/Rp = 15.5/88.72 = 0.1747 A"
 },
 {
  "id": "cir-31",
  "topic": "circuits",
  "problem": "A 13.5 V source drives two resistors in parallel: 426 ohm and 81 ohm. What total current flows? Answer in amperes, 4 decimals.",
  "params": {
   "v": 13.5,
   "r1": 426,
   "r2": 81
  },
  "answer": 0.1984,
  "solution": "Rp = 426*81/(426+81) = 68.06 ohm; I = V/Rp = 13.5/68.06 = 0.1984 A"
 },
 {
  "id": "cir-32",
  "topic": "circuits",
  "problem": "A 14.9 V source drives two resistors in parallel: 386 ohm and 372 ohm. What total current flows? Answer in amperes, 4 decimals.",
  "params": {
   "v": 14.9,
   "r1": 386,
   "r2": 372
  },
  "answer": 0.0787,
  "solution": "Rp = 386*372/(386+372) = 189.44 ohm; I = V/Rp = 14.9/189.44 = 0.0787 A"
 },
 {
  "id": "cir-33",
  "topic": "circuits",
  "problem": "A 9.6 V source drives two resistors in parallel: 183 ohm and 270 ohm. What total current flows? Answer in amperes, 4 decimals.",
  "params": {
   "v": 9.6,
   "r1": 183,
   "r2": 270
  },
  "answer": 0.088,
  "solution": "Rp = 183*270/(183+270) = 109.07 ohm; I = V/Rp = 9.6/109.07 = 0.088 A"
 },
 {
  "id": "cir-34",
  "topic": "circuits",
  "problem": "A 6.5 V source drives two resistors in parallel: 58 ohm and 450 ohm. What total current flows? Answer in amperes, 4 decimals.",
  "params": {
   "v": 6.5,
   "r1": 58,
   "r2": 450
  },
  "answer": 0.1265,
  "solution": "Rp = 58*450/(58+450) = 51.38 ohm; I = V/Rp = 6.5/51.38 = 0.1265 A"
 },
 {
  "id": "cir-35",
  "topic": "circuits",
  "problem": "A 15.7 V source drives two resistors in parallel: 79 ohm and 456 ohm. What total current flows? Answer in amperes, 4 decimals.",
  "params": {
   "v": 15.7,
   "r1": 79,
   "r2": 456
  },
  "answer": 0.2332,
  "solution": "Rp = 79*456/(79+456) = 67.33 ohm; I = V/Rp = 15.7/67.33 = 0.2332 A"
 },
 {
  "id": "cir-36",
  "topic": "circuits",
  "problem": "A 14.3 V source drives two resistors in parallel: 449 ohm and 248 ohm. What total current flows? Answer in amperes, 4 decimals.",
  "params": {
   "v": 14.3,
   "r1": 449,
   "r2": 248
  },
  "answer": 0.0895,
  "solution": "Rp = 449*248/(449+248) = 159.76 ohm; I = V/Rp = 14.3/159.76 = 0.0895 A"
 },
 {
  "id": "cir-37",
  "topic": "circuits",
  "problem": "A 8.1 V source drives two resistors in parallel: 301 ohm and 449 ohm. What total current flows? Answer in amperes, 4 decimals.",
  "params": {
   "v": 8.1,
   "r1": 301,
   "r2": 449
  },
  "answer": 0.045,
  "solution": "Rp = 301*449/(301+449) = 180.2 ohm; I = V/Rp = 8.1/180.2 = 0.045 A"
 },
 {
  "id": "cir-38",
  "topic": "circuits",
  "problem": "A 12.8 V source drives two resistors in parallel: 39 ohm and 414 ohm. What total current flows? Answer in amperes, 4 decimals.",
  "params": {
   "v": 12.8,
   "r1": 39,
   "r2": 414
  },
  "answer": 0.3591,
  "solution": "Rp = 39*414/(39+414) = 35.64 ohm; I = V/Rp = 12.8/35.64 = 0.3591 A"
 },
 {
  "id": "cir-39",
  "topic": "circuits",
  "problem": "A 12.1 V source drives two resistors in parallel: 191 ohm and 421 ohm. What total current flows? Answer in amperes, 4 decimals.",
  "params": {
   "v": 12.1,
   "r1": 191,
   "r2": 421
  },
  "answer": 0.0921,
  "solution": "Rp = 191*421/(191+421) = 131.39 ohm; I = V/Rp = 12.1/131.39 = 0.0921 A"
 }
]