If two machines have the same first-law efficiency, they must also have the same second-law efficiency
What will be an ideal response?
Not so. There are differences between the first law and second-law efficiencies.
Not every system with the same first-law efficiency must have the same second-law
efficiency.
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In an adiabatic free expansion
A. no heat is transferred between a system and its surroundings. B. the pressure remains constant. C. the temperature remains constant. D. the volume remains constant. E. the process is reversible.
A system of 3 masses is located as follows: m1 = m0 at (0, L), m2 = 2m0 at the origin, and m3 = 3m0 at (3L, 0). Where is the center of mass of these masses
A. L/6, 3L/2 B. 5L/6, 3L/2 C. 2L/13, 5L/6 D. 3L/2, L/6
What do we see in this photo?
A) Neptune B) Venus C) Mars D) Pluto E) Eris
A girl throws a rock horizontally, with a velocity of 10 m/s, from a bridge. It falls 20 m to the water below. How far does the rock travel horizontally before striking the water? (use g = 10 m/s2)
A) 14 m B) 24 m C) 20 m D) 16 m E) 12 m