A pen with mass 100g sits on a desk 1m above the ground. How much gravitational potential energy is the pen storing? g = 9.8 N/kg
0.98 J
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15
A roller coaster has 2500J of gravitational energy at the top of a loop. (assuming there is no friction) How much Kinetic energy does it have on the ground at the bottom of the loop?
2500J
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15
A cars brakes transfer the kinetic energy of a moving car into what type of energy?
Thermal
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15
Name three sources of energy which are fossil fuels
Oil, Coal and Natural Gas
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15
What type of energy is store in a battery?
Chemical Energy
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15
You're on the squat rack. You transfer 1500 J of energy (work done) in 2 seconds. What is your power?
750W [ Power = work done / time ]
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15
What gas is a product of burning fossil fuels, that contributes to the greenhouse effect?
Carbon Dioxide CO2
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15
A crane lifts a 1000N payload 25m upwards. How much "work" has the crane done?
25,000 J Work done = force x distance.
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15
When a tennis ball is drop it transfers gravitational potential energy into which type of energy?
Kinetic
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15
What is the name of the energy store when objects are up high?
Gravitational potential energy
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15
What source of energy is non renewable, but not a fossil fuel?
Nuclear (Uranium 235)
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15
What is the equation to calculate elastic potential energy?
E = 1/2 k e2
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5
10
15
20
25
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baam
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baam
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star
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lifesaver
Give 15 points!
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15
By what process does heat energy move through a solid?