Doppler Effect Sonar Lesson

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

• Low pitched
• High pitched
• Normal

Tags

NGSS.HS-PS4-1

When an ambulance move TOWARD you it sounds ________ pitched.

• high

• low

• normal

Tags

NGSS.HS-PS4-1

When the sound source moves, the frequency changes
ex. police car siren sounding lower pitch after the car passes

• pitch
• frequency
• Doppler Effect
• medium

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 can you tell about the motion of this object?

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

Tags

NGSS.HS-PS2-1

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

Sound moves in a _________.

• Transverse wave
• Longitudinal wave

Tags

NGSS.HS-PS4-1

________ is the degree of loudness of a sound.

• Pitch
• Volume

________ is the highness or lowness of a sound.

• Volume
• Pitch

Which situation will result in the lowest observed frequency?

• Observer moves at 20 m/s towards sound source.

  Sound source is motionless.

• Observer moves at 20 m/s towards sound source.

  Sound source moves at 20 m/s towards the observer.

• Observer is motionless.

  Sound source moves at 20 m/s towards the observer.

• Observer is motionless.

  Sound source moves 20 m/s away from the observer.

Tags

NGSS.HS-PS4-1