The diameter of a typical star (the sun) is approximately ____ times larger than the diameter of a typical planet (the Earth)
a. 10
b. 100
c. 1000
d. 10,000
e. 100,000
B
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The Milky Way galaxy is part of
a. the Virgo cluster. b. the Large Magellanic Cloud. c. the Small Magellanic Cloud. d. the Local Group. e. a rich cluster.
A 6.0-m wire with a mass of 50 g, is under tension. A transverse wave, for which the frequency is 810 Hz, the wavelength is 0.40 m, and the amplitude is 4.0 mm, is propagating on the wire
The time for a crest of this wave to travel the length of the wire is closest to A) 19 ms. B) 16 ms. C) 21 ms. D) 23 ms. E) 25 ms.
Which object has zero acceleration?
A) one at rest B) one moving at constant velocity C) one in mechanical equilibrium D) all of the above E) none of the above
A holographic plate produces an image for the viewer that is:
A. real B. virtual C. may be either virtual or real