Physics Chapter 7- Waves

Relative to the radio signals sent out by a spacecraft headed away from the earth, the signals that are received on the earth have

A lower frequency

Ocean waves whose period is 8 s are observed to have a wavelength of 100 m. Their speed is

12.5m/s

The amplitude of the wave shown in the figure is

B

The wavelength of the wave shown in the figure is

D

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

1540m/s

The bending of waves around the edge of an obstacle in their path is an example of

diffraction

The greater the amplitude of a wave, the greater its

energy

A sound wave whose frequency is 50 Hz

has a relatively long wavelength

You are looking at the bottom of a lake 1.2 m deep from a boat. To you the lake seems to be

less than 1.2 m deep

In an electromagnetic wave, the electric field is

perpendicular to both the magnetic field and the wave direction

In a transverse wave, the individual particles of the medium move

perpendicular to the direction of travel.

An example of a purely longitudinal wave is a

sound wave

Of the following kinds of waves, the ones that cannot travel through a vacuum are

sound waves

Sound waves whose frequency is 300 Hz have a wavelength relative to sound waves in the same medium whose frequency is 900 Hz that is

three times as great

An example of a wave that is partly longitudinal and partly transverse is a

water wave