A volume of air that is compressed with no heat entering or leaving becomes
A) cooler.
B) remain unchanged.
C) warmer.
D) none of the above
Answer: C
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A 320-g air track cart traveling at 1.25 m/s collides elastically with a stationary 270-g cart. What is the speed of the 320-g cart after the collision?
A) 0.678 m/s B) 0.106 m/s C) 0.212 m/s D) 1.36 m/s E) 1.14 m/s
A student calculates the momentum of a body moving at a relativistic speed by multiplying the rest mass by the velocity. This gives a result for the momentum that is
A. too large. B. too small. C. correct.
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A wire that is 1.0 m long with a mass of 90 g is under a tension of 710 N. When a transverse wave travels on the wire, its wavelength is 0.10 m and its amplitude is 6.5 mm. What is the frequency of this wave?
A) 890 Hz B) 920 Hz C) 1000 Hz D) 1200 Hz E) 1500 Hz