Mechanical Waves and Doppler Effect

When the car moves AWAY from you, its horn seems...

• Low pitched
• High pitched
• Normal

When an ambulance move TOWARD you it sounds ________ pitched. 

• high
• low
• medium

Tags

NGSS.MS-PS4-1

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

• True
• False

Tags

NGSS.HS-PS4-1

The Doppler effect occurs when an observer moves towards a wave-making source. 

• True
• False

Tags

NGSS.HS-PS4-1

The Doppler effect occurs when an observer moves away from a wave-making  source. 

• True
• False

Tags

NGSS.HS-PS4-1

What can you tell about this object's motion?

• Moving to the North (up).
• Moving to the South (down). 
• Moving to the West (left). 
• Moving to the East (right). 

What direction is this object moving?

• left
• right
• up
• down

What can you tell about the motion of this object?

• Moving left.
• Moving right quickly.
• Standing still. 
• Moving up slowly. 

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-PS4-5

You are driving in a car and honk the horn at a person standing in the street. As you approach the person, what happens to the pitch of the horn according to you in the car?

• It increases

• It decreases

• It stays the same because you are in the car moving with the sound.

Tags

NGSS.HS-PS4-1