Physical Science (PSY151) Chapter 7: Les Thomas
A 70-dB sound relative to a 40-dB sound is more intense by a factor of
1000
The musical note A has a frequency of 440 Hz and its wavelength in seawater is 3.5 m. The speed of sound in seawater is
1540 m/s.
Energy is carried by which one or more of the following ways?
All of the above
Which one or more of the following effects occur in all types of wave?
All of the above
Light of which of the following colors has the shortest wavelength?
Blue
A frequency that is not an overtone of the fundamental frequency F is
F/2
The property of a sound wave that governs its loudness is its
amplitude
Of the following, the highest index of refraction is found in
diamond
The greater the amplitude of a wave, the greater its
energy
A converging lens of focal length f produces a real image of a real object when the object is
farther than f from the lens.
When a sound wave goes from air into water, the quantity that remains unchanged is its
frequency
A sound wave whose frequency is 50 Hz
has a relatively long wavelength
The lower the frequency of a sound wave, the
longer its wavelength.
The ionosphere
reflects radio waves.
Of the following kinds of waves, the ones that cannot travel through a vacuum are
sound waves
An example of a wave that is partly longitudinal and partly transverse is a
water wave