An ideal monatomic gas undergoes a reversible expansion to 1.5 times its original volume. In which of these processes does the gas have the largest loss of internal energy?
A) at constant pressure
B) if the pressure increases in proportion to the volume
C) if the pressure decreases in proportion to the volume
D) at constant temperature
E) adiabatically
E
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A hollow steel ball of diameter 3.0 m just barely floats in water. What is the wall thickness of the ball? (?Fe = 7.87 g/cm3, ?water = 1.00 g/cm3)
A) 6.6 cm B) 37 cm C) 131 cm D) 79 cm
A child pulls a 3.00-kg sled across level ground at constant velocity with a light rope that makes an angle 34.0° above horizontal
The tension in the rope is 5.00 N. Assuming the acceleration of gravity is 9.81 m/s2, what is the coefficient of friction between the sled and the ground? A) 0.156 B) 0.188 C) 0.0441 D) 0.0851 E) 0.103
Special relativity predicts that moving clocks run slow
a. True b. False Indicate whether the statement is true or false
A substance is allowed to diffuse along a 10-cm length of tubing filled with water. The cross section of the tube is 5.3 cm2 . If the diffusion coefficient is 5.0 × 10^¯10 m2/s, and 6.5 × 10^¯14 kg is transported along the tube in 16 s, what is the difference in the concentration levels of the substance at the two ends of the tube?
a. 3.9E–1 kg/m3 b. 4.3E–2 kg/m3 c. 1.5E–3 kg/m3 d. 8.1E–4 kg/m3