ESJH Physical Science - Med 101

Posted Early this week for your convenience. Good luck studying.

Phys Energy Sample Quiz Questions Answer Guide

MULTIPLE CHOICE
1. D
2. B
3. C
4. B
5. D
6. C
7. A

COMPLETION
8. thermal
9. mechanical

SHORT ANSWER
10. Nuclei are broken apart.
11. D
12. a ball on a desk has potential energy; as it falls, it has both potential energy and kinetic energy
13.
thermal - Energy used in temperature, pressure, and volume exchanges. Usually involves heat. Example: lighting a candle

chemical – reactions involving chemical compounds Example: Rust comes from combination of iron, water, and oxygen to form a hydrated iron oxide, commonly called rust.

electromagnetic – involving electricity Example: Lightning

mechanical - motions of objects and their response to forces (mostly what we have been studying) Example: throwing a ball and calculating the energy involved

nuclear energy - energy released during the splitting or fusing of atomic nuclei. Example: Nuclear power plants.

PROBLEM
14. 1/2 mv2 = 1/2 (18 + 62)(7)2 = 1,960 J

15. (m)(9.8)(h) = (90)(9.8)(4) = 3,528 J

# posted by Mr. Gibney @ 4:11 PM