The metal aluminum coils in an air conditioner conduct thermal energy from inside the house and release it outside the house. what can be said about the coils when they are accepting the heat inside the house?

a: they must be warmer than the air inside the house.
b: they must be cooler than the air inside the house.
c: they must have more thermal energy than the air inside the house.
d: they must be more insulated than the air inside the house.

Imagine you are riding on a yacht in the ocean and traveling at 20 mph. you then hit a golf ball at 100 mph from the deck of the yacht. you see the ball move away from you at 100mph, while a person standing on a near by beach would observe your golf ball traveling at 120 mph (20 mph + 100 mph). now imagine you are aboard the hermes spacecraft traveling at 0.1c (1/10 the speed of light) past mars and shine a laser from the front of the ship. you would see the light traveling at c (the speed of light) away from your ship. according to einstein’s special relativity, how fast will a person on mars observe the light to be traveling? a) 0.1c (1/10 the speed of light) b) c (the speed of light) c)1.1c (c+0.1c)

The star betelgeuse is about 600 light-years away. if it explodes tonight, a. we'll know because debris from the explosion will rain down on us from space.b. we'll know it immediately because it will be brighter than the full moon in the sky.c. we won't know about it until 600 years from now.d. none of the above.

Abowling ball rolling down the lane toward the pins has gravitational potential energy. a. no b. a lot of c. a little