A 40.0-L container is divided into two equal parts by a rubber membrane. One half of the container has 1.80 moles of an ideal monatomic gas at 270 K, and the other half is a vacuum
The container does not allow any gas to escape but is free to exchange heat with the surroundings. The membrane breaks, the gas expands isothermally and eventually the gas reaches a new equilibrium condition occupying the entire volume. What is the change in entropy of the gas? A) 10.4 J/K
B) 9.16 J/K
C) 12.5 J/K
D) 14.3 J/K
E) 16.4 J/K
A
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We can be sure the particles in the rings of Neptune are very small because
a. the rings are faint in forward scattered light. b. the rings are bright in forward scattered light. c. only small particles are produced in comet impacts with larger moons. d. the magnetic field of Neptune would quickly force large particles out of the rings. e. the larger particles would be quickly destroyed by impacts with the shepherd satellites.
If an extrasolar planet suddenly became more massive, but kept the same radius and orbit, what would change during an observed transit?
A) The amount of starlight would have a larger dip during the transit. B) The amount of starlight would have a smaller dip during the transit. C) The time between transits would decrease. D) The time between transits would increase. E) Nothing. The mass of a planet does not affect the appearance of a transit.
A laser beam is incident from the air at an angle of 30.00° to the vertical onto a solution of Karo syrup in water. If the beam is refracted to 19.24° to the vertical, what is the index of refraction of the syrup solution?
While the gondola is rising at a speed of 2.0 m/s, a passenger in a balloon-supported gondola throws a small ball down at a speed of 5.0 m/s relative to his body. A person who measures the ball's velocity at the instant of release will find that the ball's velocity relative to the ground at that instant is
a. 2.0 m/s, up. b. 3.0 m/s, down. c. 3.0 m/s, up. d. 5.0 m/s, down. e. 12.8 m/s, down.