Physics
The frequency of a source is 20 kHz. The frequency of sound wave produced by it in water and air will be
- same as that source
- > 20 kHz
- < 20 kHz
- Depend upon velocity
Related Questions
Absolute unit of work is
- joule
- erg
- Both (a) and (b)
- None of these
The effective diameter of the circular outline of a spherical lens is known as
- focal length
- principal focus
- aperture of lens
- radius of curvature
Which of the following phenomena is not due to high specific heat of water?
- Water is used as coolant
- For fomentation hot water bottles are used.
- Water is used in cold countries as heat reservoir of wine and juice bottles.
- None of the above