Two coherent sound waves will constructively interfere when the path difference is the wavelength times what?
A) half an integer
B) an integer
C) half an odd integer
D) an even integer plus 1/2
B
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Martian "blueberries" made of the mineral hematite which form in water were first discovered by which Mars rover?
A) Spirit B) Opportunity C) Curiosity D) Sojourner
A normal heat engine is used to drive an electric generator. Part of the power from this generator runs a refrigerator that absorbs the waste heat from the engine and pumps it back into the hot reservoir.
A. first kind B. second kind
When 5.00 A is flowing through an 10.0-? device, how much power is being dissipated in the device?
A) 50.0 W B) 250 W C) 500 W D) 2.50 kW
Materials in which the electrons are bound very tightly to the nuclei are referred to as
A) insulators. B) conductors. C) semiconductors. D) superconductors. E) polar.