An index of refraction less than one for a medium would imply that
A) that the speed of light in the medium is the same as the speed of light in vacuum.
B) that the speed of light in the medium is greater than the speed of light in vacuum.
C) that the speed of light in the medium is less than the speed of light in vacuum.
D) refraction is not possible.
E) reflection is not possible.
B
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Consider a plot of the displacement (x) as a function of the applied force (F) for an ideal elastic spring. The slope of the curve would be
A) the acceleration due to gravity. B) the spring constant. C) the reciprocal of the acceleration of gravity. D) the mass of the object attached to the spring. E) the reciprocal of the spring constant.
What is the major observational difference between a Seyfert galaxy and a normal spiral galaxy?
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A wheel rotates through an angle of 13.8 rad as it slows down from 22.0 rad/s to 13.5 rad/s. What is the magnitude of the average angular acceleration of the wheel?
A) 0.616 rad/s2 B) 5.45 rad/s2 C) 111 rad/s2 D) 22.5 rad/s2 E) 10.9 rad/s2
An automobile engine operates with an overall efficiency of 12%. How much energy is delivered as waste heat (in gallons of gasoline) for each 10 gallons of fuel burned?
a. 1.2 b. 8.8 c. 6.5 d. 4.7 e. 7.5