A Human Ear Can Hear A sound only if its frequency lies between ……
A.20 …. 3000Hertz
B.20 …. 2000
C.20….200
D.None of them
Which of the following is related to the pitch of Sound Waves
A.Wave length
B.Speed
C.Amplitude
D.Frequency
Light Travels …..
A.Faster Than Sound
B.Slower than sound
C.Faster than gamma Rays
D.Faster Than X rays
….. Is A Device which is used for Measurement of Atomspheric Pressure
A.Hydrometer
B.Barometer
C.Gygometer
D.None
A black hole has a very strong _______?
A. Electric Field
B. Magnetic Field
C. Electromagnetic Feild
D. Gravitational field
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