Class VIII

He symbol of decibel is
  1. Dc
  2. dB
  3. Dec
  4. dl
Number of vibrations in a second is called
  1. pitch
  2. frequency
  3. amplitude
  4. infrasound
Distance from one crest to another or one to another wave is called a
  1. wavelength
  2. frequency
  3. amplitude
  4. all of them
Sound travels at speed of 1482m/s in
  1. air
  2. water
  3. steel
  4. water
A loud sound contains more energy than
  1. soft sound
  2. aero plane sound
  3. blast sound
  4. rocket sound
Time Elapsed

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

Get Started!

we provide the best
services to our students

AmazingCounters.com Views

 

LKG - 12th

Rs 1,999  Annual
Plan
TOP