Question

1) in a fit of physics rebellion, you throw an oscillator tuned to a frequency of 50 hz straight upward from a tall building. how does the frequency you hear change with time as the oscillator return to you.
a) The frequency will be lower than 50 Hz but does not change with time.
b) The frequency will be higher than 50 Hz but does not change with time.
c) The frequency will be lower than 50 Hz and decrease further with time.
d) The frequency will be higher than 50 Hz and increase further with time.

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2) An object attached to a spring exhibits simple harmonic motion with an amplitude of 10.5 cm How far from equilibrium will the object be when the system's potential energy is equal to its kinetic energy?
a)11.51 cm
b) 6.40 cm
c) 7.42 cm
d) The distance can't be determined from the data given.

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3) An object attached to a spring has simple harmonic motion with an amplitude of 2.45 cm. When the object is 2.00 cm from the equilibrium position, what fraction of its total energy is potential energy?
a) one-third
b) one-quarter
c) one-half
d) three-quarters
e) two-thirds

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4) As a graduate student, you are teaching your first physics lecture while the professor is away. To demonstrate interference of sound waves, you have set up two speakers that are driven coherently and in phase by the same frequency generator on the front desk. Each speaker generates sound with a 2.4-m wavelength. one student in the front row says she hears a very low volume (loudness) of the sound from the speakers compered to the volume of the sound she hears when only one speaker is generating sound. What would be the difference in the distance between her and each of the speaker?
a) 4.8 m
b) 2.4 m
c) 1.2 m
d) you cannot determine the difference in the distance in from the data given.

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5) Standing waves result from the superposition of the waves have:
a) The same amplitude and frequency and opposite direction of propagation.
b) The same amplitude, slightly different frequencies, and opposite directions of propagation  
c) The same amplitude, slightly different frequencies, and opposition directions of propagation.

Answer 1