The intensity of a sound wave is a measure of:
1.energy/area
2.force/time
3.momentum change/time
4.power/time
5.pressure difference/time
6.None of the above.
6
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All the ordinary matter, both luminous and nonluminous, makes up less than 5% of the Universe.
Answer the following statement true (T) or false (F)
If an object feels cold to the touch, the only statement that you can make that must be correct is that
a. the object has a smaller coefficient of thermal conductivity than your hand. b. the volume of the object will increase while it is in contact with your hand. c. the object contains less thermal energy than your hand. d. the object is at a lower temperature than your hand. e. the object cannot be a liquid.
Process of Science: In order for us to understand how the solar system got to be that way it is, we must identify the major solar system patterns that our formation theory must explain
Name 3 patterns of motion or planetary arrangement/location that our theory should be able to explain.
Suppose you charge two transparencies by rubbing and then hold them near each other but not touching. Regarding the electric and magnetic forces they exert on each other,
A) they will exert neither electric nor magnetic forces because they are not in contact with each other. B) they will exert electric forces but not magnetic forces. C) they will exert neither electric nor magnetic forces because neither object is moving. D) they will exert both electric and magnetic forces. E) they will exert magnetic forces but not electric forces.