The scarps on Mercury were probably caused by
A) tectonic activity.
B) meteorite bombardment.
C) a tidal bulge.
D) volcanism.
E) the interior cooling and shrinking.
E
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Equilibrium: Three objects are connected by weightless flexible strings as shown in the figure. The pulley has no appreciable mass or friction, and the string connected to the block on the horizontal bench pulls on it parallel to the bench surface. The coefficients of friction between the bench and the block on it are µs = 0.66 and µk = 0.325. You observe that this system remains at rest.(a) Find the mass of the hanging object A.(b) What is the magnitude of the friction force on the block on the bench?
Fill in the blank(s) with the appropriate word(s).
Doubling the weight suspended vertically from a coil spring will result in a change in the displacement of the spring's lower end by what factor?
a. 4.0 c. 2.0 b. 3.0 d. 0.5
The force of air impact upon the sail of a boat is greater if the air
A) bounces upon impact. B) encounters the sail head-on. C) encounters the sail at a grazing angle.
Specific Heat: Object 1 has three times the specific heat capacity and four times the mass of Object 2. The two objects are given the same amount of heat. If the temperature of Object 1 changes by an amount ?T, the change in temperature of Object 2 will be
A. ?T.
B. 
?T.
C. 
?T.
D. 6?T.
E. 12?T.