Class VIII

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
In dholak sound is produced due to ... 
  1. Stretc hed membrane 
  2. Stretc hed strings 
  3. Air column 
  4. Vibration of air 
Length of vocal cords of women is _____ men
  1. greater than
  2. less than
  3. same as
  4. slightly greater than
Voice box or larynx of human process
  1. Sound
  2. Wind
  3. Loudness
  4. None
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