Consider a small satellite moving in a circular orbit (radius r) about a spherical planet (mass M). The period does not depend upon
A) g at the satellite position.
B) the planet mass.
C) the satellite mass.
D) the radius r.
E) the universal gravitational constant.
C
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An astronomer named _______________ used globular clusters to locate the center of the galaxy. (enter last name only)
Fill in the blank(s) with correct word
A 50.00 ml sample of mercury at room temperature (293.0 K) is cooled. What is the volume of the sample when the mercury reaches 273.0 K? The coefficient of volume expansion of mercury is 182.0 x 
A. 49.39 ml B. 49.94 ml C. 49.82 ml D. 48.18 ml E. 49.96 ml
A car travels north at 30 m/s for one half hour. It then travels south at 40 m/s for 15 minutes. The total distance the car has traveled and its displacement are:
a. 18 km; 18 km S. b. 36 km; 36 km S. c. 36 km; 36 km N. d. 90 km; 18 km N. e. 90 km; 36 km N.
Which of the following planets moves the slowest in its orbit around the Sun?
a. Earth b. Mars c. Venus d. Mercury