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Question

Conservation of Energy

In each of the folllowing situations, energy changes form. Study each situation and identify the energy transformations. If it's wrong please tell me the right answer.

1. An electric blanket warms a bed on a chilly night.

A. electrical energy to thermal energy.

2. A rock in death valley, California, becomes hot during a summer aftrnoon.

A. ????????

3. A deputy sheriff rides a horse while directing traffic.

A. ????????

4. A chandelier brightens a ballroom after a waiter moves a switch.

A. electrical to thermal.

5. A swallow sitting on a fence sings a song for anyone who will listen.

A. ????????

Answer 1

1. electrical energy to heat energy

2. electromagnetic energy to heat energy

3. mechanical energy to work energy? (haha robot horse)

4. work energy to electrical energy (the chandelier doesn't necessarily produce heat, what if it was CFL lighting?)

5. work energy into electromagnetic energy (because I believe sound energy is also electromagnetic)

Answer 2

1. Agree

2. Solar to thermal energy

3. Chemical to motion energy

4. Electrical to radiant energy

5. Chemical to sound energy

More info can be found at:

http://www.eia.doe.gov/kids/energyfacts/...