Chunks of rock and metal that orbit the Sun but are much smaller than the planets are referred to as
A) comets
B) dwarf planets
C) meteors
D) asteroids
D
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A cylinder contains 23 moles of an ideal gas at a temperature of 300 K. The gas is compressed at constant pressure until the final volume equals 0.43 times the initial volume
The molar heat capacity at constant volume of the gas is 24.0 J/mol · K and the ideal gas constant is R = 8.314 J/mol ? K. The heat absorbed by the gas is closest to A) -130 kJ. B) -94 kJ. C) 130 kJ. D) 94 kJ. E) -33 kJ.
Suppose the ends of a 30-m-long steel beam are rigidly clamped at 0°C to prevent expansion. The beam has a cross-sectional area of 30 cm2. What force against the clamps does the beam exert when it is heated to 40°C? (?Steel = 1.1 × 10?5/°C, Ysteel = 20 × 1010 N/m2).
What will be an ideal response?
One way that future space stations may create artificial gravity is by rotating the station. Consider a cylindrical space station 380 m in diameter that is rotating about its longitudinal axis
Astronauts walk on the inside surface of the space station. How long will it take for each rotation of the cylinder if it is to provide "normal" gravity for the astronauts? A) 6.2 s B) 28 s C) 4.4 s D) 39 s
According to quantum theory, a macroscopic object such as a baseball
A) has no wavelength at all. B) has an infinite wavelength. C) has a very short wavelength. D) has a very long wavelength. E) is really made out of microscopic baked beans.