Two asteroids have identical masses. However, one asteroid is twice as far from the Sun than the other. According to Newton's Universal Law of Gravitation the force of gravity exerted by the Sun on the more distant asteroid is
A) the same size as the force exerted on the closer asteroid
B) one-quarter of the size of the force exerted on the closer asteroid
C) twice as large as the force exerted on the closer asteroid
D) one-half of the size of the force exerted on the closer asteroid
B
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All the following statements about Mars are true. Which one might be the cause of a significant loss of atmospheric gas to space?
A) The rock on Mars is probably red because of chemical reactions with oxygen that had been released into the atmosphere through the outgassing of water molecules. B) Mars lost its global magnetic field, leaving the atmosphere vulnerable to the solar wind. C) The axis tilt of Mars is thought to change significantly with time. D) Mars probably once had a much higher density of greenhouse gases in its atmosphere than it does today.
As a space shuttle is launched into orbit, the direction of its acceleration
a. always points upward. b. always points downward. c. varies between pointing upward and pointing downward. d. stays constant.
The cost of oil as sold does not include all the concomitant costs, such as those for pollution, the cost of maintaining a defense establishment to protect oil supply, etc
What will be an ideal response?
What are the two criteria used in Table 54.1 to identify and classify igneous rocks?