Chapter 20 Introduction to Waves

If the velocity of a sound wave remains constant and its frequency increases, which characteristic of the wave will decrease?

• amplitude

• wavelength

• energy

• speed

A certain wave has compressions and rarefactions. How should this wave be classified?

• as a longitudinal wave

• as a surface wave

• as a transverse wave

• as an electromagnetic wave

Which statement describes the wave interactions in sound navigation and ranging (SONAR)?

• Sound is transmitted through the water and diffracted by hard surfaces.

• Sound is transmitted through the water and reflected by hard surfaces

• Sound is diffracted through the water and transmitted by hard surfaces.

• Sound is diffracted through the water and reflected by hard surfaces.

A wave has a frequency of 4.0 Hz. If it is traveling at a velocity of 20 m/s, what is the wavelength of the wave?

• 80 m

• 16 m

• 5.0 m

• 0.2 m

If a wave has a frequency of 0.4 Hz and a wavelength of 15 m, what is its velocity?

• 0.2 m/s

• 6.0 m/s

• 38 m/s

• 60 m/s

he diagram below represents a wave pattern.

Which type of wave is represented?

• longitudinal wave

• transverse wave

• sound wave

• primary wave

What is the effect on frequency of a wave when the wavelength is doubled?

• Frequency is also doubled.

• Frequency remains the same.

• Frequency is reduced to one-fourth.

• Frequency is reduced to one-half.

A sound wave with a frequency of 240 hertz travels through a material at a speed of 340 meters per second. Which statement is true about a sound wave with a frequency of 300 hertz traveling in the same material?

• It would travel at the same speed.

• It would have the same wavelength.

• It would have the same period.

• It would have the same frequency.

Which statement is true for all types of waves?

• Wave speed is determined by the frequency

• Wave speed increases as the wavelength of the wave increases

• Wave motion transports particles of matter.

• . Wave motion transfers energy from one place to another

Which type of wave can travel in a vacuum?

• sound

• mechanical

• surface

• electromagnetic