Given the equation 
, which answer provides the best description of a possible physical situation?
A. A 3.00-kg mass is suspended from the ceiling.
B. A 2.00-kg mass hanging over a pulley drags a 3.00-kg mass along a frictionless horizontal surface.
C. A 3.00-kg mass hanging over a pulley drags a 2.00-kg mass along a frictionless horizontal surface.
D. A 3.00-kg mass hanging over a pulley drags a 5.00-kg mass along a frictionless horizontal surface.
E. A 5.00-kg mass hanging over a pulley drags a 3.00-kg mass along a frictionless horizontal surface.
Answer: C
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An aluminum bar (E 5 72 GPa, v 5 0.33) of diameter 50 mm cannot exceed a diameter of 50.1 mm when compressed by axial force P. The maximum acceptable compressive load P is approximately:
(A) 190 kN (B) 200 kN (C) 470 kN (D) 860 kN
What is exceptional about the rotation of Hyperion? Give a possible explanation
What will be an ideal response?
Second Law of Thermodynamics: Which one of the following is a true statement?
A. The second law of thermodynamics is a consequence of the first law of thermodynamics. B. It is possible for heat to flow spontaneously from a hot body to a cold one or from a cold one to a hot one, depending on whether or not the process is reversible or irreversible. C. It is not possible to convert work entirely into heat. D. It is impossible to transfer heat from a cooler to a hotter body. E. All of these statements are false.
First Law of Thermodynamics: A 40.0-L container is divided into two equal parts by a rubber membrane. One half of the container has 1.50 moles of an ideal monatomic gas at 250 K, and the other half is a vacuum. The container is well insulated, so there is no exchange of heat with the surroundings. The membrane breaks, and eventually the gas reaches a new equilibrium condition occupying the entire volume. What is the final temperature of the gas?
A. 100 K B. 125 K C. 157 K D. 180 K E. 250 K