For a pair of dice, how many microstates are there that result in the macrostate of rolling a 7?
A. 1
B. 5
C. 6
D. 7
E. 36
Answer: C
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Two cylinders are in contact along an inclined plane. The upper cylinder (weight is 2.5W) rests against the lower cylinder (weight W), and both are supported by a wall where the contact force is N1. Assume that all friction forces are negligible. An expression for contact force N1 in terms of load variable W is:
(A) 1.75W
(B) 3.5W
(C) 1.57W
(D) 2.01W
In the formation of a cloud, moist air rises and
A) expands. B) cools. C) condenses. D) all of the above E) none of the above
A solid sphere of mass 2.50 kg and radius 0.120 m is at rest at the top of a ramp inclined 15.0°. It rolls to the bottom without slipping. The upper end of the ramp is 1.20 m higher than the lower end. Find the sphere's total kinetic energy when it reaches the bottom
a. 70.0 J b. 47.9 J c. 29.4 J d. 8.80 J
The electron spin quantum number can have values of
A) -1/2, -1, 0, +1, +1/2. B) -1/2, -1, +1, +1/2. C) -1/2, 0, +1/2. D) -1/2, +1/2. E) only +1/2.