Wave Properties & Doppler Effect

The pitch of a sound wave relates to the wave's _________________.

• Amplitude

• Frequency

• Wavelength

• Period

Tags

NGSS.HS-PS4-1

What is the Doppler Effect?

• A change in frequency due to the relative motion of a wave source and an observer

• When a wave overlaps with another wave

• When a wave bounces off of another object

• When a wave bends due to traveling through a different medium

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3

Look at the picture. Who is experiencing a higher pitched sound?

• Observer A

• Observer B

• There's no difference

Tags

NGSS.HS-PS4-1

Look at the picture. Who is experiencing a lower pitched sound?

• Observer A

• Observer B

• There is no difference

Tags

NGSS.HS-PS4-1

A car moves at 20 m/s away from a whistle. The whistle is stationary. The whistle makes a sound with a frequency of 500 Hz. The speed of sound in air is 340 m/s.

What is the frequency observed by the driver of the car?

• 531 Hz

• 471 Hz

• 521 Hz

• 481 Hz

Tags

NGSS.HS-PS4-1

A car moves at 20 m/s towards a whistle. The whistle is stationary. The whistle makes a sound with a frequency of 500 Hz. The speed of sound in air is 340 m/s.

What is the frequency observed by the driver of the car?

• 529 Hz

• 471 Hz

• 521 Hz

• 481 Hz

Tags

NGSS.HS-PS4-1

Which image represents a longitudinal wave?

• A

• B

Tags

NGSS.MS-PS4-1

Which letter represents wavelength?

• A
• B
• C
• D

Tags

NGSS.HS-PS4-1

Which letter is a trough?

• F
• G
• H
• J

 A wave has frequency of 50 Hz and a wavelength of 10 m. What is the speed of the wave?

• 500 m/s
• 50 m/s
• 5 m/s
• 0.5 m/s

Tags

NGSS.HS-PS4-1