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