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