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प्रश्न
What type of scans are used these days to monitor the growth of developing baby in the uterus of the mother ?
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उत्तर
Ultrasound scans are used to monitor the growth of a developing baby in the uterus of a woman.
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संबंधित प्रश्न
Explain the working and application of a sonar.
A sonar device on a submarine sends out a signal and receives an echo 5 s later. Calculate the speed of sound in water if the distance of the object from the submarine is 3625 m.
A wave is moving in air with a velocity of 340 m/s. Calculate the wavelength if its frequency is 512 vibrations/sec.
What happens to the pitch of a sound if its frequency increases ?
What is meant by the quality (or timbre) of sound ? On what factor does the quality (or timbre) of a sound depend ?
What is the range of frequencies associated with (a) infrasound (b) audible sound, and (c) ultrasound ?
Which of the two produces ultrasonic waves : porpoise or whale ?
What is sonar ? Explain its use.
A sonar station picks up a return signal after 3 seconds. How far away is the object ? (Speed of sound in water = 1440 m/s).
What type of waves are generated by SONAR device fixed to a fishing ship ?
