When the distance between two charges is halved, the electric force between the charges
A) quadruples.
B) doubles.
C) is half.
D) is reduced by one-quarter.
E) none of the above
Answer: A
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What did the Huygens and Cassini probes find on the surface of Titan?
A) Rocks and no water B) Methane oceans C) An ocean and some lakes of methane, ethane, and other hydrocarbons D) Lakes and oceans of water E) No methane, no water; just rocks
At the microscopic level, the difference between gases and solids is that
A) there is much more distance (at least 10 times more) between neighboring atoms in a gas than between neighboring atoms in a solid. B) the gas's atoms move throughout the gas, while the solid's atoms remain near their original locations. C) in a gas, the individual atoms are larger. D) both answers A and B are correct. E) both answers B and C are correct.
In video 2 for Chapter 17, they show a block of glass with 2 reflections of light. Why are there two?
A. The light refracts as it goes through the block, and this makes a second reflection. B. Diffraction at the surface produces multiple images. C. There is a reflection from the front of the block and from the back of the block D. There is an additional reflection inside the camera lens.
On a scale in which the distance from Earth to the Sun is about 15 meters, the distance from Earth to the Moon is ________
A) about 30 meters B) small enough to fit within your hand C) about 1 meter D) about 5 meters