Class VIII

The pitch of sound depends on
  1. frequency
  2. amplitude
  3. both of these
  4. None of these
Speed of sound in solids is ______ the speed of sound in liquids
  1. same as
  2. greater than
  3. less than
  4. sometimes greater and sometimes less than
To and fro or back and forth motion of an object is termed as _ . 
  1. Frequency 
  2. Amplitude 
  3. Vibration 
  4. Time period 
Speed of sound in solids is _ the speed of sound in liquids . 
  1. Same as 
  2. Greater than 
  3. Less than 
  4. Sometimes greater and sometimes less than 
Sound cannot travel in _____.
  1. solids
  2. liquids
  3. gases
  4. vacuum
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