The magnitude of a displacement is ______________ the magnitude of the distance traveled
a. always unequal to
b. less than or equal to
c. always equal to
d. greater than or equal to
e. none of these; the two cannot be compared.
b
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Answer each of the following questions to compare the two plots.
a) Which plot, if either, better shows mass and radius information for all the planets? b) Which plot, if either, better emphasizes the differences between Jupiter and Saturn? c) Which plot, if either, could more easily be extended to show a planet with twice Jupiter's mass or radius?
How do we know what asteroids are made of?
A. The spectrum of sunlight reflected from an asteroid shows absorption features, from which we can determine its composition. B. Astronomers have landed a spacecraft on one of them and analyzed its composition. C. Astronomers have studied meteorites that originated in the Asteroid belt. D. All of these choices are correct.
Doubling the potential difference across a length of copper wire causes what change to the drift speed of the charge carriers?
1.No change occurs since drift speed is constant for copper. 2.The drift speed halves. 3.The drift speed doubles. 4.The drift speed quadruples.
The quantity "stress" expressed in terms of the fundamental quantities (mass, length, time) is equivalent to:
a. MLT-1. c. M2L-1T-3. b. ML-1T-2. d. a dimensionless quantity.