The electrostatic potential 
F. 
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Boyle's law and Charles' law each respectively assume what is held constant?
A) temperature, volume B) temperature, pressure C) pressure, volume D) volume, pressure E) volume, temperature
A camera lens that acts like a telescope to magnify images is referred to as a
A) normal lens. B) telephoto lens. C) wide-angle lens. D) zoom lens. E) digital lens.
You see a lightning flash and half a second later hear a loud blast of thunder. How far away did the lightning hit?
a. about a mile b. half a mile c. a tenth of a mile d. none of the above
Scientists suspect that Mars once had a global magnetic field. Assuming this is true, which of the following could explain why Mars today lacks a global magnetic field like that of Earth?
A) Mars's interior has cooled so much that its molten core layer no longer undergoes convection. B) Mars rotates much slower than the Earth. C) The Martian core is made of rock, while Earth's core is made of metal. D) Mars is too far from the Sun to have a global magnetic field.