Sound Worksheet-5

Sound Worksheet-5

 

  1. Can sound travel through (a) iron, and (b) water?

 

  1. Can sound travel through vacuum?

 

  1. Name the type of waves which are used by astronauts to communicate with one another on moon (or in outer space).

 

  1. Name one solid, one liquid and one gas through which sound can travel.

 

  1. Which of the following cannot transmit sound?

Water, Vacuum, Aluminum, Oxygen gas

 

  1. Name the physical quantity whose SI unit is 'hertz'.

 

  1. What is the SI unit of frequency?

 

  1. What type of wave is represented :

(a) By density-distance graph?

(b) By displacement-distance graph?

 

  1. Is the speed of sound more in water or in steel ?

 

  1. In which medium sound travels faster: air or iron?

 

  1. In which medium sound travels fastest: air, water or steel?

 

  1. Out of solids, liquids and gases :

(a) In which medium sound travels slowest?

(b) In which medium sound travels fastest?

 

  1. 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

 

  1. If you want to hear a train approaching from far away, why is it more convenient to put the ear to the track?

 

  1. What name is given to those aircrafts which fly at speeds greater than the speed of sound?

 

  1.  A jet aircraft flies at a speed of 410 m/s. What is this speed known as?

 

  1. What is meant by supersonic speed?

 

  1. State one observation from everyday life which shows that sound travels much more slow than light.

 

  1. Name the two types of waves which can be generated in a long flexible spring (or slinky).

 

  1. A stone is dropped on the surface of water in a pond. Name the type of waves produced.

 

Answer:

  1. Yes

 

  1. No

 

  1. Radio waves

 

  1. Copper, sea water, Hydrogen

 

  1. Vacuum

 

  1. Frequency

 

  1. hertz

 

  1. (a) Longitudinal wave, (b) Transverse wave

 

  1. steel

 

  1. iron

 

  1. Steel

 

  1. Gases, solids

 

  1. In copper :3750 m/s; In aluminium :5100 m/s

 

 

  1. Supersonic aircrafts

 

  1. Supersonic speed

 

 

  1. We see lighting first and listen to sound afterwards in rainy season

 

  1. Transverse waves and Longitudinal waves

 

  1. Transverse waves