1. Name the physical quantity whose SI unit is hertz.
2. If you want to hear a train approaching from far away, why it is more convenient to put the ear into the track ?
3. What is the mathematical relationship between frequently, speed and wave length?
4. What is the SI unit of wave length?
5. If the frequency of a wave is 250Hz , Find time period.
6. Write the full form of SONAR. Which type of sound waves is produced in SONAR?
7. What are the uses of SONAR?
8. What are mechanical waves?
9. On what factor does the pitch of a sound depends?
10. If any explosion takes place at the bottom of a lake, what type of shock wave in the water will take place?
Solution: a) Hand written pdf solution.
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