The major moons of ______________ were named after literary characters

a. Mars
b. Jupiter
c. Saturn
d. Uranus
e. Neptune


d

Physics & Space Science

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A hot object is placed in contact with a cold object. We observe that heat flows spontaneously from the hot object to the cold object, but not in the other direction. According to the argument in this chapter, this is so because

A. this increases the entropies of both objects. B. this decreases the entropy of the combined system. C. the system will tend to evolve toward macropartitions that have more microstates. D. A and C E. B and C

Physics & Space Science

An ice skater spins at 3.5 rev/s with his arms are extended. He draws his arms in and spins at 8.3 rev/s. By what factor does his moment of inertia change in the process?

a. 2.4 b. 0.58 c. 0.42 d. 0.12

Physics & Space Science

Power: A series circuit has a 50-Hz ac source, a 60-? resistor, a 0.50-H inductor, and a 10-?F capacitor, as shown in the figure. The rms current in the circuit is 2.2 A. What is the power factor of the circuit?

A. 0.35 B. 0.33 C. 0.31 D. 0.30 E. 0.28

Physics & Space Science

An astronaut is orbiting a black hole with a mass of 2.0 × 1031 kg at a distance of 126 km from its center. The astronaut is positioned in the spacecraft so that his 0.10-kg cheeks are 0.050 m on either side of the orbital circle

What is the net tidal force pulling his cheeks apart? G = 6.67 x 10-11 N•m2/kg2. A) 1,000 N B) 2,000 N C) 10,000 N D) 20,000 N E) 100,000 N

Physics & Space Science