A vibrating guitar string emits a tone simultaneously with one from a 500-Hz tuning fork. If a beat frequency of 4 Hz results, what is the frequency of vibration of the string?
a. 2500 Hz
c. 504 Hz
b. 496 Hz
d. Either choice B or C is valid.
D
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A string is wrapped around a pulley with a radius of 2.0 cm. The pulley is initially at rest. A constant force of 50 N is applied to the string, causing the pulley to rotate and the string to unwind
If the string unwinds 1.2 m in 4.9 s, what is the moment of inertia of the pulley? A) 0.17 kg?m2 B) 17 kg?m2 C) 14 kg?m2 D) 0.20 kg?m2 E) 0.017 kg?m2
A skater can spin faster by pulling her arms closer to her body or spin slower by spreading her arms out from her body. This is due to
A) the law of gravity. B) Newton's third law. C) conservation of momentum. D) conservation of angular momentum. E) conservation of energy.
Which subatomic particle or particles is/are found in the nucleus of an atom?
A) protons and neutrons B) protons only C) neutrons and electrons D) electrons and protons
How does the separation of maxima on the screen vary with slit separation?