What is the wavelength of an electromagnetic wave that travels at 3 × 108 m/s and has a frequency of 60 MHz? (1 MHz = 1,000,000 Hz)

5m

Explanation:

Given that:

Wavelength (λ)= ?

Frequency of wave (F) = 60MHz

[If 1 MHz = 1,000,000 Hz

60MHz = 60 x 1,000,000 = 6 x 10^7Hz]

Speed of wave (V) = 3 x 10^8 m/s

The wavelength is the distance covered by the wave in one complete cycle. It is measured in metres, and represented by the symbol λ.

So, apply the formula V = F λ

Make λ the subject formula

λ = V/ F

λ = 3 x 10^8 m/s / 6 x 10^7Hz

λ = 5m

Thus, the wavelength of an electromagnetic wave is 5 metres.

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.