Question
What are the uses of ultrasonic waves?

Answer

Ultrasonic waves are used for the following purposes:
  1. They are used in $\text{SONAR}$ for finding the range and direction of submarines.
  2. They are used for detecting the presence of cracks and other inhomogeneities in solids.
  3. They are used to kill the bacteria and hence for sterilising milk.
  4. They are used for cleaning the surface of solid.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

A pulse travelling on a string is represented by the function:$\text{y}=\frac{\text{a}^3}{(\text{x}-\text{vt})^2+\text{a}^2},$
where a = 5mm and v = 20cm/s. Sketch the shape of the string at t = 0, 1s and 2s.Take x = 0 in the middle of the string.
The antiseptics used for cuts and wounds in the human flesh have low surface tensions. Why?
The displacement of an object changes with time according to $s=t^3-6 t^2+3 t+4$, then the acceleration of the object at instant is zero. What is its velocity?
Explain why (or how):
Bats can ascertain distances, directions, nature, and sizes of the obstacles without any “eyes”,
Explain why: Air pressure in a car tyre increases during driving.
It is known that polishing a surface beyond a certain limit increases the frictional force rather than decreasing it. Explain.
The length and breadth of a rectangle are measured as $(\text{a}\pm\Delta\text{a})$ and $(\text{b}\pm\Delta\text{b})$ respectively. Find:
  1. Relative error.
  2. Absolute error in the measurement of area.
A small disc is set rolling with a speed v on the horizontal part of the track of the previous problem from right to left. To what height will it climb up the curved part?
Time period of a simple pendulum on the earth's surface $T_1$ is and when it is taken to a heights $\frac{1}{2} R$ from the earth's surface then period becomes $T_2 . R$ is the radius of earth. Find the value of $\frac{T_1}{T_2}.$
A simple pendulum of length 40cm is taken inside a deep mine. Assume for the time being that the mine is 1600km deep. Calculate the time period of the pendulum there. Radius of the earth = 6400km.