Mechanical Waves and Sound

an area of a longitudinal wave where the particles of the medium are spread out

• crest

• rarefaction

• trough

• medium

MECHANICAL WAVE

• a disturbance in matter that carries energy from one place to another.

• occurs when two or more waves overlap each oher

• the lowest point in a wave

• the highest point in a wave

Tags

NGSS.MS-PS4-1

A wave that requires a medium through wave which to travel

•  electromagnetic  wave

•  longitudinal wave

•  mechanical wave

•  transverse wave

The units for frequency are measured in _____________.

• hertz

• seconds

• m/s

• grams

Tags

NGSS.MS-PS4-1

What do seismic waves and sound waves have in common?

• they're mechanical waves

• they're electromagnetic waves

• they're transverse waves

• they're permanent waves

Tags

NGSS.MS-PS4-1

Which is an example of a longitudinal wave?

• light wave

• sound wave

• visible wave

• radio wave

While in the front yard, you can hear your dog barking in the backyard. This situation illustrates that sound waves can...

• refract

• reflect

• form beats

• diffract

The Doppler effect is seen when a wave-making source moves toward an observer. 

• True

• False

Tags

NGSS.HS-PS4-1

An observer passes a 500 Hz sound source and moves away with a speed of 30 ms-1.

The frequency heard by the moving observer is

• 456 Hz

• 544 Hz

• 460 Hz

• 548 Hz

Tags

NGSS.HS-PS4-1

When the sound source moves, the frequency changes
ex. ambulance sounds higher in pitch as it approached you

• pitch

• frequency

• Doppler Effect

• medium