Sound Worksheet-5
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Can sound travel through (a) iron, and (b) water?
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Can sound travel through vacuum?
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Name the type of waves which are used by astronauts to communicate with one another on moon (or in outer space).
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Name one solid, one liquid and one gas through which sound can travel.
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Which of the following cannot transmit sound?
Water, Vacuum, Aluminum, Oxygen gas
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Name the physical quantity whose SI unit is 'hertz'.
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What is the SI unit of frequency?
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What type of wave is represented :
(a) By density-distance graph?
(b) By displacement-distance graph?
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Is the speed of sound more in water or in steel ?
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In which medium sound travels faster: air or iron?
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In which medium sound travels fastest: air, water or steel?
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Out of solids, liquids and gases :
(a) In which medium sound travels slowest?
(b) In which medium sound travels fastest?
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Which of the following is the speed of sound in copper and which in aluminum?
(a) 5100 m/s (b) 1500 m/s (c) 3750 m/s
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If you want to hear a train approaching from far away, why is it more convenient to put the ear to the track?
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What name is given to those aircrafts which fly at speeds greater than the speed of sound?
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A jet aircraft flies at a speed of 410 m/s. What is this speed known as?
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What is meant by supersonic speed?
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State one observation from everyday life which shows that sound travels much more slow than light.
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Name the two types of waves which can be generated in a long flexible spring (or slinky).
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A stone is dropped on the surface of water in a pond. Name the type of waves produced.
Answer:
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Yes
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No
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Radio waves
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Copper, sea water, Hydrogen
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Vacuum
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Frequency
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hertz
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(a) Longitudinal wave, (b) Transverse wave
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steel
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iron
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Steel
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Gases, solids
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In copper :3750 m/s; In aluminium :5100 m/s
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–
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Supersonic aircrafts
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Supersonic speed
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–
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We see lighting first and listen to sound afterwards in rainy season
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Transverse waves and Longitudinal waves
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Transverse waves
