Class VII

Ultrasound is reflected by
  1. soft tissues only
  2. hard tissues only
  3. soft and hard tissues both
  4. hard muscles only
Eardrum will burst at
  1. 40 dB
  2. 80 dB
  3. 160 dB
  4. 320 dB
More dense liquid, the
  1. slower the speed of sound
  2. faster the speed of sound
  3. more the distance covered by sound
  4. lesser the distance covered by sound
Sounds are measured in units called
  1. Hertz (Hz)
  2. Decibels (dB)
  3. Meters (m)
  4. Pascal (Pa)
We cannot hear voice of alarm clock when there is
  1. vacuum in the jar
  2. air in the jar
  3. liquid in the jar
  4. solid in the jar
Time Elapsed

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

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