Sound Waves 8 Question Preview (ID: 50928)


Sound Plays An Important Role In Our Life .We Use Sound To Communicate Through Our Voice And To Enjoy Listening To Music .Our Game Is About Properties Of Sound. TEACHERS: click here for quick copy question ID numbers.

The time separating production of sound and receiving its echo is t=2 sec ( Velocity of sound in air is 340m/sec then the distance is :
a) 1000 m
b) 1020 m
c) 12320 m
d) 680 m

Echo is a bounce of sound on an obstacle by :
a) Refraction
b) Absorption
c) Reflection
d) Emision

Ultra sounds have frequencies :
a) Lie between 20 HZ and 20000 HZ
b) Above 20000 Hz
c) Below 20 Hz
d) Equals to 20 Hz

Sounds whose frequencies Below 20 Hz is :
a) Audible sound
b) Ultra sound
c) Infrared Sound
d) None of the choices

The audible sound has frequencies:
a) Lie between 20HZ and 2000Hz
b) Below 20 Hz
c) Above 20000Hz
d) All choices

Speakers:
a) Sound receivers
b) Sound effector
c) Sound emittors
d) All choices

Our Ears are :
a) Sound receivers
b) Sound emitters
c) Sound effectors
d) None of the choices

Sound wave is :
a) Light wave
b) Mechanical wave
c) Electromagnetic wave
d) None of the above choices

Sound propagates in:
a) Solid Only
b) Liquid Only
c) Gases Only
d) All choices

Sound wave cannot propagate in
a) solids
b) Vacum
c) Liquid
d) Gases

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