Download Chapter 15 –Energy

Chapter 15 –Energy-Flashcards
1. Work is a transfer of
Energy, mass, motion
2. The energy of motion is called
Kinetic, potential, work
3. A small 20kg canoe is floating downriver at speed of 2 m/s. Find the canoe’s KE.
20J, 40 J, 100J
4. An object’s gravitational potential energy is NOT directly related to which of the following?
Its mass, it speed, acceleration due to gravity
5. Which of the following is an example of an object with elastic PE?
A wind-up toy that has been wound up, a stretched rubber band, both examples
6. A 4 kg cat is resting on top of a bookshelf that is 3m high. What is the cat’s PE?
12J, 18 J, 118J
7. The energy stored in gasoline is
Chemical , mechanical , nuclear
8. Nuclear power plants are designed to convert nuclear energy into
Chemical energy, electrical energy, mechanical energy
9. Solar cells convert what type of energy into electrical energy?
Chemical, mechanical, electromagnetic
10. Which of the following statement is true according to the law of conservation of energy?
Energy cannot be destroyed
Energy can be converted from one form to another
Both statements
11. The equation E = mc2 relates energy and
Force, mass, work
12. Biomass energy is what type of energy stored in living things?
Chemical, nuclear, thermal
13. Nonrenewable energy resources do not include
Coal, oil, hydrogen fuel cells
14. Fossil fuels currently account for the majority of the world’s energy use because they are
Nonpolluting, renewable, relatively inexpensive and readily available
15. A drawback of solar energy is that it
Produces water pollution, depends on the climate, is not a renewable resource
16. A benefit of a hydrogen fuel cell is that its byproduct is
Carbon dioxide, water, uranium
17.Energy of an object increases when ? is done on the object.
Force, mass, work
18. Energy and work are measured in the SI unit called the
Newton, joule, watt
19. If the ? of an object doubles, its KE doubles
Mass, speed, velocity
20. Energy that is stored due to position or shape is called
KE, PE, thermal energy
21. When a pole-vaulter flexes the pole, the pole-vaulter increases the pole’s ? PE
Chemical, elastic, gravitational
22. The sum of the KE and PE of an object is called its
Conversion, conservation, mechanical energy
23. All energy can be considered as KE, ?, or the energy in fields.
PE, thermal energy, nuclear energy
24. Wind turbines convert ? energy into electrical energy.
Kinetic, potential, thermal
25. “Energy cannot be created or destroyed” is a statement of the law of conservation of
Energy, mass, matter
26. In the equation E=mc2, c is the speed of
constant, light, energy
27. Energy resources that exist in limited amounts and once used, cannot be replaced except over the
cource of millions of years are called ? energy resources.
Nonrenewable, renewable, polluting
28. Geothermal energy, in addition to being renewable, offers the benefit of being
Polluting, nonpolluting, nonrenewable
29. Turning off unused lights or appliances is an example of energy
Conservation, conversion, transformation
30.At which location does the ball have the least gravitation PE?
A, C, D
31. Compare the gravitational PE of the ball locations B and E.
B is less than E, B = E, B is greater than E
32. Does the total mechanical energy of the ball between locations A and F ever equal to zero?
Yes, no
33. Is the total mechanical energy of the ball conserved as the ball bounces?
Yes, no