Question

A wave travels with a velocity of 8000m/s and a frequency of 2000 Hz. The wavelength of this wave is

Answer 1

Hey Mate :)

Here is your Answer :-
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Frequency,
v = 2 kHz
= 2000 Hz

Wavelength,
λ = 35 cm
= 0.35 m

Speed,
V = wavelength x Frequency

V = λ x v
= 0.35 m x 2000 Hz
= 700 m/s

Time taken by the wave to travel distance of 1.5 km is

t = d/v

= (1.5 x 1000 m) / 700 ms-^1

= 15/7 s = 2.1 s

Hence sound will take 2.1 s to travel a distance of 1.5 km.

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Hope it helps :)

Answer 2

VELOCITY = V = 8×10³m/s

FREQUENCY = n = 2×10³Hz

WAVELENGTH = a(Lambada) = ?

V = n × a

V/n = a

8×10³m/s/2×10³Hz = a

4 m = a

so the wave length is " a = 4m "