When a wheel is rolling without slipping, the magnitude of its velocity relative to the ground is greatest at
a. the point in contact with the ground. b. the point at the center of the wheel.
c. the point at the top of the wheel opposite to the point in contact with the ground. d. the point farthest forward from the center of mass of the wheel.
e. the point farthest behind the center of mass of the wheel.
C
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If the intensity of a sound is increased by a factor of 1000, how is the decibel level changed? The new decibel level will be:
a. three units greater. c. thirty times greater. b. ten times greater. d. twenty units greater.
The Sun's average surface (photosphere) temperature is about
A) 1,000,000 K. B) 5,800 K. C) 1,000 K. D) 37,000 K.
Calculate the slopes for the A, C, and E portions of the figure. Rank the slopes from least to greatest
The narrowness of the rings of Uranus and Neptune is believed to be caused by
a. gravitational interactions between ring particles. b. a spiral density wave which confines them. c. the magnetic field which holds them in place. d. the smaller mass of Uranus and Neptune as compared to that of Saturn. e. small shepherd moons that orbit near the rings.