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48 Science -- Sound

Why is ultrasound used in the field of medical science?

Why is ultrasound used in the field of medical science?

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More questions on Sound

Ultrasonic waves can penetrate through different solids,why?

Write any two difference between infrasonic sound and audible sound.

The sounds becomes fainter when it propagates away from the sources, why?

A man claps and the echo produced from the wall of tall building reaches to ear after 0.5 seconds. If the speed of sound in air is 330 m/s, calculate the distance between man and the wall.

Echo is not heard in a small room, why? The speed of sound wave is 350 m/s and its wave length is 5 meter . What is its frequency?

For the creation of an echo, the minimum distance between the source and the object must be 17.2 m. In a small room, this condition is not fulfilled so, echo is not heard.

Solution:

Given,

Velocity = 350 m/s

Wavelength = 5 m

We know,

Velocity = Wavelength * Frequency

or, Frequency = Velocity / Wavelength

= 350 / 5

= 70 Hertz

Hence, the required frequency of the sound wave is 70 Hertz.

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