State Kepler's first law
What will be an ideal response?
Planets move in elliptical orbits, with the Sun at one of the focal points.
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Because of its axial tilt and more elliptical orbit, Mars' polar caps change size even more than do the Earth's
Indicate whether the statement is true or false
Two small balls, A and B, attract each other gravitationally, exerting a force of magnitude F on each other
If we now double both masses and the separation of the balls, what will now be the magnitude of the attractive force that they exert on each one? A) 16F B) 8F C) 4F D) F E) F/4
According to Aristotle, which of these is a "natural" or "unforced" motion?
A) A book coming to rest as it slides along the floor. B) A stone falling straight downward. C) Both of the above. D) Neither of the above.
Of the following gases, which is the most important contributor to the Earth's greenhouse effect?
a. water vapor b. ozone c. CFCs d. methane