Class VII

Sound is a form of
  1. force
  2. power
  3. light
  4. energy
Normal value of decibel that our ears can detect is
  1. -20
  2. 0
  3. 20
  4. 40
Another example of wind instrument is
  1. guitar
  2. piano
  3. violin
  4. trombone
Ultrasound is reflected by
  1. soft tissues only
  2. hard tissues only
  3. soft and hard tissues both
  4. hard muscles only
Measure of decibel starts from
  1. 0
  2. 20
  3. 20,000
  4. 10
Time Elapsed

HR : MIN : SEC
Question Answered
0
Score out of 100
0

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