13. At a particular temperature, a sound wave in air has a frequency of 262 Hz a
ID: 1302367 • Letter: 1
Question
13. At a particular temperature, a sound wave in air has a frequency of 262 Hz and travels
with a speed of 343 m/s. What is the wavelength of this sound wave?
a) 5.24 m b) 3.93 m c) 2.62 m d) 1.31 m
14. Which one of the following general statements about waves is correct?
a) The wavelength of a wave cannot be less than its velocity.
b) The sum of the wavelength and frequency of a wave equals zero.
c) The product of the wavelength and frequency of a wave equals its velocity.
d) The frequency of a wave always equals its wavelength.
15. Let's say that the thermal expansion coefficient for your finger is great than that for the
ring on your finger. When (if any time) will it be easier to take off your ring?
a) hot weather b) cold weather c) makes no difference
16. A block is attached to a horizontal spring and undergoes simple harmonic motion on a
frictionless surface. What happens to the frequency of the oscillations if the force constant of
the spring is doubled and the mass of the block is cut in half?
a) The frequency is four times higher
b) The frequency is two times higher
c) The frequency is the same
d) The frequency is two times lower
e) The frequency is four times lower
17. Which is not an example of a transverse wave?
a) doing "the wave" b) sound c) vibrating guitar string d) water waves
18. A grandfather clock is based on a pendulum. The timing of this clock is running 10% too
fast. How do you fix it?
a) Increase the length of the pendulum by 10%
b) Increase the length of the pendulum by 1%
c) Decrease the length of the pendulum by 10%
d) Decrease the length of the pendulum by 1%
e) Increase the mass of pendulum by 10%
Explanation / Answer
16)
b) The frequency is two times higher
17)
b) sound
18)
c) Decrease the length of the pendulum by 10%
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