Question

The coefficient of ‘y’ in the expression yz
2 + 7y
2 + 5 is _________

Answer 1

Answer:

Frequency (f)= number of oscillations / time taken =15/1=15 Hz

The distance between a crest and a trough is equal to half of wavelength (λ).

or 20=λ/2 or λ=40 cm

Velocity of wave, v=fλ=15×40=600cm/s