If you were standing on the Earth's equator, which of the following in the sky would pass through your zenith during the entire day (24 hours)?
a. the north celestial pole
b. the south celestial pole
c. the celestial equator
d. the nadir
c
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A 2 kg ball is floating in water. The volume displaced by the ball is
A. 0.005 
B. 0.004
C. 0.003
D. 0.002
E. 0.001
Orion is visible on winter evenings in the northern hemisphere but not summer evenings because of
A) interference from the full Moon. B) the tilt of Earth's axis. C) the location of Earth in its orbit. D) the precession of Earth's axis. E) baseball on television.
Which of these graphs would be correct for the speed of a ball thrown upward? 
A. A B. B C. C D. D
The electron orbiting the proton in the hydrogen atom is at a distance 
m. What is the ratio of the electric force to the gravitation force between these particles? (The mass of the proton is 1.67
kg and the mass of the electron is 
a. 
b. 
c. 
d. 
e. 