A satellite of mass M takes time T to orbit a planet. If the satellite had twice as much mass, the time for it to orbit the planet at the same altitude would be
A) 4T.
B) 2T.
C) T.
D) T/2.
E) T/4.
C
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In the light curve below, what is the period of the eclipsing binary?
a.
5 days
b.
32.5 days
c.
7.5 days
d.
42.5 days
e.
50 days
Assume a 100-yard football field represents the 14-billion-year history of the universe with one end as the origin and the other end representing the present. The existence of human beings will extend from ____ to the present "goal line."
a. the 50-yard line b. the 5-yard line c. the one-yard line d. the one-inch line
A point on the rim of a 0.15-m-radius rotating disk has a centripetal acceleration of 5.0 m/s2 . What is the angular speed of a point 0.075 m from the center of the disk?
a. 0.89 rad/s b. 1.6 rad/s c. 3.2 rad/s d. 5.8 rad/s
In order for a telescope to produce a large magnification one would select lenses of
A. short focal length for both objective and eyepiece. B. large focal length for the objective and short focal length for the eyepiece. C. short focal length for the objective and long focal length for the eyepiece. D. large focal length for both objective and eyepiece.