If you wish to spear a red fish with a red laser beam, you should compensate for refraction and aim your laser
A) directly at the sighted fish.
B) above the sighted fish.
C) below the sighted fish.
Answer: A
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Conservation of Momentum: Consider two less-than-desirable options. In the first you are driving 30 mph and crash head-on into an identical car also going 30 mph. In the second option you are driving 30 mph and crash head-on into a stationary brick wall. In neither case does your car bounce back from the thing it hits, and the collision time is the same in both cases. Which of these two situations would result in the greater impact force on your car?
A. hitting the other car B. hitting the brick wall C. The force would be the same in both cases. D. None of these choices are correct.
Beneath the surface of which moon of Saturn is there evidence for the existence of a subsurface ocean of liquid water?
A) Titan B) Enceladus C) Dione D) Helene
The ratio of the density of a material to the density of water is
a. the mass density. b. the weight density. c. the specific gravity. d. the buoyant force. e. none of the above.
Express the sum 1.00 kg + 1531 g + 2.54 × 104 mg in kilograms with the correct number of significant figures
A) 2.56 kg B) 27.9 kg C) 2.53 kg D) 2.79 kg