Which among the following statements is Correct regarding the ultra sonic sound waves 1 nb...........

Science Affairs Physics

Download Solution PDF

Which among the following statements is Correct, regarding the ultra sonic sound waves?

1. its frequency is greater than 20,000Hz

2. it is used in measuring the depth of sea

3. the liquid from which the ultra sonic waves pass gets hot

4. if this sound wave is passed through the water at 0oC ,it starts boiling

Code

1 and 3 are correct

1,2 and 3 are correct

only 1 is correct

all are correct

छोटे Courses बड़े Results

Master Physics

Prepare through Micro-courses

Try Now

Explanation:

The sound waves whose frequencies are more than 20000Hz are called ultrasonic waves and such waves cant be heard by human ears .some animals like birds ,bats ,cats,dolphins etc,not only hear ultrasonics but also generate them.
Utilities:
In medical science ultrasonics are used in bloodless surgical operations ,in detection of tumor and teeth cavity etc.
In westen countries milk is purified by ultrasonic waves ,also used in measuring the sea depth etc.
Blisters are formed more rapidly by the
Steam of boiling water in comparison to