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is used to form of babies in the in a process called scanning.
Ultrasound into the body from image produced.
is a region on a wave where medium are or where the pressure is .
is a region on a wave where the of medium are far apart and pressure is .
( i ) V = lambda.
(ii ) of audible sound wave is Hz – 20kHz ( very less than ultrasound)
Since audible sound F < ultrasound of audible sound will be . .
Used to detect in the sea.
Used to detect in womb ( pre – natal scanning )
( i ) Pressure of a liquid = p h
= 1 x 10 ^ 3 x 10 x
Pressure = x 10 ^ 6 Pa
( ii ) Total pressure at depth of 120 m = Atmospheric pressure
Total pressure = 1.2 x 10 ^ 6 Pa + x 10^ 5 Pa
= x 10 ^ 6 Pa ( final answer ).
( i ) Force = Area.
Force = 1.3 x 10 ^ 6 x
= x 10 ^ 5 N.
( ii ) 1) Additional resistance acting on the from the water.
2) Additional force applied by the inside the in an direction onto the .
( i ) is an example of a wave that comprises and rarefactions.
( ii ) water .
These vibrating with one another .
waves consisting of and rarefactions.
( iii )1) Speed of the in water.
2 ) Distance = speed / 2
( IV ) Used to detect in wombs ( pre_natal scanning ) .
Frequency of transmitter = 1
Time period ( T ) = Time between 2 consecutive S pulses
Time period = x 1.0 x 10 ^ -6 s
= x 10 ^ -6 s
Number of pulses sent by source in 1 sec =
= 1 / 6 x 10 ^ – 6
= x 10 ^ 5 pulses ( final answer )
( V ) Wavelength = Frequency
= 4000 / x 10 ^ 6
= x 10 ^ -4 m. ( final answer )
is a wave comprising and rarefactions.
It has a frequency than the range of kHz – 25 KHz.