A radio wave has a wavelength of 150m. If the velocity of...
A radio wave has a wavelength of 150m. If the velocity of radio waves in free spaces is 3 x 10\(^8\) ms\(^{-1}\), calculate the frequency of the radio wave
4.50 x 1010Hz
5.0 x 109Hz
4.5 x 109Hz
2.0 x 106Hz
Correct answer is D
f = \(\frac{V}{\lambda} = \frac{3 \times 10^8}{150}\)
= 2.0 x 10\(^6\) Hz
A wire, 20m long is heated from a temperature of 5°C to 55°C. If the change in length is 0.0...
The acceleration due to gravity may be defined as the force ...
A vapour whose molecules are in dynamic equilibrium with those of its own liquid is said to be ...
Of the following derived units, the one that is not a unit of power is ...