All RR Lyrae stars have about the same:
A) period of six hours.
B) distance of 32 light years.
C) galactic location and speed.
D) luminosity of about 100 Suns.
E) locations in the centers of globular star clusters.
D
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A capacitor in an RC circuit is charged, storing energy 1.25 mJ. What is the time required to discharge this capacitor, as compared to the time required to discharge an identical capacitor in an identical RC circuit which has stored 2.5 mJ?
A. twice the time B. half the time C. the same time D. the answer depends on the values of R and C.
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.
In the Copernican model, Venus moves around an epicycle centered on a line between Earth and the Sun
Indicate whether the statement is true or false
Which of the following represents a case in which you are not accelerating?
A) driving in a straight line at 100 kilometers per hour B) going from 0 to 100 kilometers per hour in 10 seconds C) slamming on the brakes to come to a stop at a stop sign D) driving 100 kilometers per hour around a curve