An 8.0 kg-m2 wheel with 155. Joules of rotational kinetic energy requires what torque to bring it to rest in 4.0 s?
A) -1.6 N-m
B) -1.2 N-m
C) +0.88 N-m
D) -1.8 N-m
E) -1.0 N-m
E
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The three lowest resonate frequencies of a system are 50 Hz, 150 Hz, and 250 Hz. The system could be
A. a tube of air closed at both ends. B. a tube of air open at one end. C. a tube of air open at both ends. D. a vibrating string with fixed ends.
To see the Sun's hot corona (a temperature of 1,000,000 K), which part of the electromagnetic spectrum should one observe?
A) the visible B) the X-ray C) the ultraviolet D) the radio E) the infrared
A violation of the second law of thermodynamics would occur if
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_____ says that the total mass of a star must equal the sum of the masses of its shells
A) The law of conservation of mass B) The law of mass action C) Fick's first law of mass transfer D) Newton's law of mass accumulation