Physical Science B lesson 17 Properties of Sound

A sound wave is traveling at a speed of 330 m/s. If the frequency of the wave is 990 Hz, what is the wavelength of the sound wave?

0.33 m

A sound wave is passing by 100 times every second. What is the frequency of the sound wave?

100 Hz

If you bang on a large metal gong with a stick, producing a loud sound that can be heard by your friend down the street, how does this sound travel to your friend's ear?

Banging the gong vibrates the metal, which passes its energy to the air, sending a sound wave through the air to your friend's ear.

Which of the choices correctly describes what would happen when the compression of one sound wave overlaps with the compression of another wave?

The compression of one wave interferes constructively with the region of compression of the second wave, so the waves reinforce each other. The sound becomes louder under constructive interference.

Which of the following choices correctly describes the period and frequency of a sound waves that passes one point ten times every second?

The period is 1/10 second, and the frequency is 10 Hz

Which of the following choices correctly describes the behavior of sound wave as they move from cold to warm air?

They refract because sound waves travel at different speeds in hot and cold air

sound waves

a mechanical wave that propagates through a medium as compressions and rarefactions

decibel

a unit used to measure relative differences in sound intensity, based on factors of 10

The distance from the rest position to the peak of a wave crest or trough is defined as the __________.

amplitude

sound intensity

the amount of power per unit area in a sound wave

interference

the constructive and destructive results of sound waves adding or subtracting as two or more waves encounter

pitch

the frequency of a sound wave

acoustics

the study of the qualities of a room that affect how sound is heard

frequency beat

when two different frequencies interact with both constructive and destructive interference causing an alternating soft and loud rhythm