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