In the photoelectric effect, the brighter the illuminating light on a photosensitive surface, the greater the
A) number of ejected electrons.
B) velocity of ejected electrons.
C) both of these
D) neither of these
Answer: A
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On a scale where the distance from Earth to the Sun is about 15 meters, the distance from Earth to the Moon is
A) small enough to fit within your hand. B) about 1 meter. C) about 5 meters. D) about 30 meters.
Imagine that the magnet is moving downward instead of upward. 
In this situation, specify the directions of each of the vector quantities described below. Use the answer chart provided above and to the right (note that answers B and E refer to the +y and -y directions, respectively). What is the direction of 
at the origin (point O)?
A. A B. B C. C D. D E. E F. F T. Zero
An imaginary line from one geographic pole to the other along the surface of Earth perpendicular to the equator is called
a. a longitude. b. a meridian. c. the International Date Line. d. a parallel.
If the plane of the Earth's equator were not tilted with respect to the ecliptic plane
a. the daylight period of Earth would be the same year-round. b. there would be no seasonal changes. c. Earth's poles would not experience six month long nights. d. All of the above