doppler effect and sonic boom

Long sound waves are...

• high pitched
• low pitched
• medium pitched

Short sound waves are...

• high pitched
• low pitched
• medium pitched

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

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

• True
• False

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

• True
• False

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

• True
• False

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). 

When a car moves towards you, the sound of its horn seems relatively...

• Low pitched
• High pitched
• Normal

What direction is this object moving?

• left
• right
• up
• down