HARD
9th ICSE
IMPORTANT
Earn 100

Draw displacement -time graph of a wave and show on it the amplitude and time period of the wave.

Important Questions on Propagation of Sound Waves

MEDIUM
9th ICSE
IMPORTANT
Concise Physics I.C.S.E Part I For Class 9>Chapter 8 - Propagation of Sound Waves>EXERCISE–8(A)>Q 23
State two properties of the medium which the speed of sound depends.
EASY
9th ICSE
IMPORTANT
Concise Physics I.C.S.E Part I For Class 9>Chapter 8 - Propagation of Sound Waves>EXERCISE–8(A)>Q 24
Arrange the speed of sound in gases Vg, in solids Vs and in liquids Vl in an ascending order.
EASY
9th ICSE
IMPORTANT
Concise Physics I.C.S.E Part I For Class 9>Chapter 8 - Propagation of Sound Waves>EXERCISE–8(A)>Q 26
Compare approximately the speed of sound in air, water and steel.
EASY
9th ICSE
IMPORTANT
Concise Physics I.C.S.E Part I For Class 9>Chapter 8 - Propagation of Sound Waves>EXERCISE–8(A)>Q 27
Can sound travel in vacuum?
EASY
9th ICSE
IMPORTANT
Concise Physics I.C.S.E Part I For Class 9>Chapter 8 - Propagation of Sound Waves>EXERCISE–8(A)>Q 27
How does the speed of sound differs in different media?
EASY
9th ICSE
IMPORTANT
Concise Physics I.C.S.E Part I For Class 9>Chapter 8 - Propagation of Sound Waves>EXERCISE–8(A)>Q 30

The sound of an explosion on the surface of the lake is heard by a boatman100 m away and by a diver 100 m below the point of the explosion. Who wound hear the sound first, boatman or the diver?

EASY
9th ICSE
IMPORTANT
Concise Physics I.C.S.E Part I For Class 9>Chapter 8 - Propagation of Sound Waves>EXERCISE–8(A)>Q 30

The sound of an explosion on the surface of the lake is heard by a boatman away and by a diver  below the point of the explosion.

Who wound hear the sound first-: boatman or the diver?   Give the reason.

EASY
9th ICSE
IMPORTANT
Concise Physics I.C.S.E Part I For Class 9>Chapter 8 - Propagation of Sound Waves>EXERCISE–8(A)>Q 30

The sound of an explosion on the surface of the lake is heard by a boatman 100 m away and by a diver 100 m below the point of the explosion. If the sound takes t sec. to reach the boatman, how much time approximately does it take to reach the diver?