Celsius degrees are larger than Fahrenheit degrees
a. True
b. False
Indicate whether the statement is true or false
True
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Kepler's discovery that T2 /r3 = K applies
A) to orbits where K is a universal constant. B) only to circular orbits. C) to lunar motion provided K is the same for planetary motion. D) to elliptical orbits where r is the average distance.
As yet, no human probe has left our solar system and approached another star
Indicate whether the statement is true or false
Two objects, each of weight W, hang vertically by spring scales as shown in the figure. The pulleys and the strings attached to the objects have negligible weight, and there is no appreciable friction in the pulleys. The reading in each scale is
A) W. B) more than W, but not quite twice as much. C) less than W. D) 2W. E) more than 2W.
Which of the following is not a line of evidence supporting the hypothesis that our Moon formed as a result of a giant impact?
A) The Pacific Ocean appears to be a large crater—probably the one made by the giant impact. B) Computer simulations show that the Moon could really have formed in this way. C) The Moon's average density suggests it is made of rock much more like that of the Earth's outer layers than that of Earth as a whole. D) The Moon has a much smaller proportion of easily vaporized materials than Earth.