The energy of a ball rolling up an inclined plane is an example of both kinetic and gravitational potential energy
a. True
b. False
Indicate whether the statement is true or false
True
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Is a fuel-cell vehicle properly described as a "heat engine"?
A) Yes, because it uses thermal energy to produce electricity. B) Yes, because it uses chemical energy to create electric energy. C) Yes, because it uses thermal energy to do work. D) No, because it converts chemical energy directly to electric energy. E) No, because it converts electric energy directly into chemical energy.
As you comb your hair, electrons are rubbed onto the comb, which becomes
A) negatively charged. B) positively charged. C) ionized.
A diver shines light up to the surface of a flat glass-bottomed boat at an angle of 30° relative to the normal. If the index of refraction of water and glass are 1.33 and 1.5, respectively, at what angle (in degrees) does the light leave the glass (relative to its normal)?
a. 26 b. 35 c. 42 d. 22 e. 48
While our Magellanic Clouds are irregulars, the companions to Andromeda are ellipticals
Indicate whether the statement is true or false