When the midpoint of the face of the Sun appears to be on the horizon, where is the actual midpoint from the point of view of the observer?
a. above the horizon at sunrise and below the horizon at sunset
b. on the horizon
c. below the horizon
d. above the horizon
C
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Moving electric charges make magnetic fields
a. True b. False Indicate whether the statement is true or false
_____ says that energy must flow from hot regions to cooler regions either by conduction, convection, or radiation
A) The law of energy transport B) The law of conservation of energy C) The theory of energy equilibrium D) The theory of special relativity
Magnifying Glass With the Image at the Near Point of the Eye: A person with normal eyesight uses a converging lens of focal length 10 cm as a magnifying glass to finish an engraving job. To see detail, he holds the lens very close to his eyes. At what minimum distance from the job must he hold the lens?
A. 14 cm B. 7.1 cm C. 9.4 cm D. 30 cm E. 20 cm
Two identical clocks are made. One is placed on the surface of a massive planet, and the other is placed in interstellar space. Which runs faster?
A. The space clock B. The planet clock C. Both clocks will run at the same rate