A diver shines light up to the surface of a smooth pond at a 10° angle to the normal. Some light passes into the air above, and the part that reflects back into the water makes an angle to the normal of
A) less than 10°.
B) 10°.
C) more than 10°.
Answer: B
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Rank the following features in order from oldest to youngest:
a) the tectonic ridge from 3a to 3b b) crater 1a c) the smooth floor of crater 1b
A 0.16-pF parallel-plate capacitor is charged to 10 V. Then the battery is disconnected from the capacitor. When 1.00 × 107 electrons are now placed on the negative plate of the capacitor, the voltage between the plates changes by
A. ?5.0 V. B. ?1.1 V. C. 0 V. D. +1.1 V. E. +5.0 V.
The temperature of a quantity of ideal gas in a sealed container is increased from 0°C to 819°C. What happens to the speed of the molecules with average kinetic energy of the gas as a result of this temperature increase?
a. It does not change since this speed is independent of temperature. b. It increases but it is less than double the original speed. c. It doubles. d. It quadruples.
If a proton is released at the equator and falls toward the Earth under the influence of gravity, the magnetic force on the proton will be toward the:
a. north. b. south. c. east. d. west.