Sound waves

Waves combine to form a wave with smaller amplitude this is called

• constructive interference

• destructive interference

• Compressions

• troughs

What part of the telephone is responsible for converting sound waves into electrical signals?

• A.   switch

• C.microphone

• D.   speaker

Happen when a sound wave matches the natural frequency of frequency of an object and cause it to vibrate.

   

•      Resonance

• Echo

• Interference

• Absorption

A pattern of vibration that looks like a wave that is standing still is called

     

   

     

     

• a) Standing wave

•    b) Constructive interference

• c) Ultrasound

• d) Resonance

Sound waves that have frequencies greater than 20000Hz

                                  

                                

• a) Echolocation   

• b) Ultrasound

• c) Electrical signals        

• c) sonic boom

is the process of sending waves to echolocate

                                      

• a)Echolocation

• b) sonic boom

• c) Resonance

The factors affect the speed of sound are

•                          altitude

•                         temperature and type of medium

• . frequency

• pressure

1) A sonic boom is produced by a jet. What can you determine about the jet’s motion?

• It is increasing in altitude

• .Its engines produced a backfire.

• It is traveling faster than the speed of sound.

The smaller amplitude, the louder the sound.                              

• true 

• false 

Sound waves travel in one direction.                              

• true

• false