IGCSE Sound worksheet

IGCSE Sound worksheet

Sound   10:16

IGCSE2  Sound Worksheet

11.  State true or false for each of the following statement

a.       Sound travels the fastest in solids and slowest in air.

b.      Sound can travel in vacuum

c.       The speed of sound is    3 x 10⁸ m/s

d.      The speed of sound is a constant.

e.      Sound can travel from the Sun to the Earth.

f.        Pitch means how loud a sound is.

22.  What is the meaning of compression and rarefaction in term of vibration of sound waves?

33.  Delia ties a silver spoon to a piece of string and holds the ends to her ears.

When her friend Donny, strikes the spoon with a pencil, Delia hears a sound like a bell.

Explain the reason for this.

44. Explain why we do not hear explosions on the Sun, although they must be very loud.

55.   A musical instrument produces a sound wave with a frequency of 1000 Hz.  The sound wave  has a wavelength of 0.34 m in air.  Calculate the speed of the sound wave in air.

66.  In water the speed of sound is different.  The speed of a sound wave in water is 1300 m/s. The sound wave has a frequency of 1000Hz.  Calculate the wavelength of this sound wave.

77.  The diagram shows a ship using an Echo locator (SONAR) to find a shoal of fish.  The pulsed wave is transmitted from the ship, which is then reflected off the top of the shoal and is then picked up by the receiver.

 

A ship sending sound signals to the sea receives the echo 2 s later. If sound travels a t 1400 m/s in sea water, how deep is the sea?

88.  A student sits in the middle of a rectangular hall is 17 m wide, as shown in the diagram below. When student bangsna drum, two echos are heared, 0.05 s and 0.08 s respectively, after the bang.

 Assuming that there is no echo from the ceiling, calculate:

(i)      The speed os sound in the air

(ii)    The length of the hall

Sound worksheet

Sound worksheet

Sound   13:39

SOUND WORKSHEET

1. If 5 seconds elaps between a lighting flash and the clap of thunder how far away is the

storm? Speed of sound = 330 m/s.

2. (a) A girl stands 160 away from a high wall and claps her hands at a steady rate so that each

clap coincides with the echo of the one before. If she makes 60 claps in 1 minute, what value

does this give for the speed of sound?

(b) If she moves 40m closer to the wall she finds the clapping rate has to 80 per minute.

What value do these measurements give for the speed of sound?

(c) if she moves again and finds the clapping rate becomes 30 per minute, how far is she

from the wall if speed of sound is the value you found in (a)?

3. (a) what properties of sound suggest it is a wave of motion?

(b) how does a progresive transverse wave differ from a logitudinal one?

4. A sound wave in air is made up of compressions and rarefaction. State what are the meant

by a compression and rarefaction?

5. The distance between two concecutive rarefaction in a sound wave is 2.5 m. The speed of

sound in air is 330 m/s. Calculate the frequency of this sound wave.

6. A person makes a loud sound and hears the echo of this sound 1.2 s later. Calculate how far

the person is from the object causing the echo. Assume that the speed of sound is 330 m/s.

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