The law of reflection
a. applies only to plane mirrors.
b. is limited to regular reflection.
c. must be modified for diffuse reflection.
d. applies to all reflecting surfaces.
d
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Energy Conservation With Conservative Forces: A lightweight object and a very heavy object are sliding with equal speeds along a level frictionless surface. They both slide up the same frictionless hill with no air resistance. Which object rises to a greater height?
A. The heavy object, because it has greater initial kinetic energy. B. The light object, because gravity slows it down less. C. The lightweight object, because the force of gravity on it is less. D. The heavy object, because it has more mass to carry it up the hill. E. They both slide to exactly the same height.
Assuming that features you see on Mars are similar to features found on Earth, what would a casual inspection of the interactive photo of Mars lead you to suspect about water on Mars?
A. Abundant surface water is found in large, brownish pools inside craters. B. There are numerous small streams flowing with water. C. Surface water only exists as frozen ice. D. No surface water currently exists in any form.
Three cars (car F, car G, and car H) are moving with the same velocity when the driver suddenly slams on the brakes, locking the wheels. The most massive car is car F, the least massive is car H, and all three cars have identical tires
(a) Which car travels the longest distance to skid to a stop? A) Car F B) Car G C) Car H D) They all travel the same distance in stopping. (b) For which car does friction do the largest amount of work in stopping the car? A) Car F B) Car G C) Car H D) The amount of work done by friction is the same for all cars.
The three fusion reactions in the Sun that form helium from hydrogen are together called the
a. proton-proton chain. b. hydrogen cycle. c. helium sequence. d. neutrino exchange.