Class VIII

In dholak sound is produced due to ... 
  1. Stretc hed membrane 
  2. Stretc hed strings 
  3. Air column 
  4. Vibration of air 
To and fro or back and forth motion of an object is termed as _____.
  1. frequency
  2. amplitude
  3. vibration
  4. time period
In dholak sound is produced due to ...
  1. stretched membrane
  2. stretched strings
  3. air column
  4. vibration of air
Sound is kind of
  1. work
  2. energy
  3. force
  4. None of these
Length of vocal cords of women is _ men . 
  1. Greater than 
  2. Less than 
  3. Same as 
  4. Slightly greater than 
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