In the middle of the Indian Ocean, the tsunami referred to in the passage was a train of pulses approximating a sinusoidal wave with speed 200 m/s and wavelength 150 km. What was the approximate period of these pulses?

A. 1 min

B. 3 min

C. 5 min

D. 15 min

Question

Physics

Fiona Brooks

26 June, 15:10

In the middle of the Indian Ocean, the tsunami referred to in the passage was a train of pulses approximating a sinusoidal wave with speed 200 m/s and wavelength 150 km. What was the approximate period of these pulses?

A. 1 min

B. 3 min

C. 5 min

D. 15 min

+2

Answers (1)

Know the Answer?

Jasiah Watts · Answer 1

13 min

Explanation:

Period: This is the time taken by a wave to make one complete oscillation. The S. I unit of period is second (s).

The expression for period, speed and wavelength of a wave is given as,

v = λ/T ... Equation 1

Where v = speed of the wave, λ = wavelength of the wave, T = period of the wave.

making T the subject of the equation,

T = λ/V ... Equation 2

Given: λ = 150 km = 150000 m, v = 200 m/s.

Substitute into equation 2

T = 150000/200

T = 750 seconds.

T = 750/60 =

T = 12.5 min

T≈ 13 min

Thus the approximate period of the wave = 13 min

In the middle of the Indian Ocean, the tsunami referred to in the passage was a train of pulses approximating a sinusoidal wave with speed 200 m/s and wavelength 150 km. What was the approximate period of these pulses?A. 1 minB. 3 minC. 5 minD. 15 min

In the middle of the Indian Ocean, the tsunami referred to in the passage was a train of pulses approximating a sinusoidal wave with speed 200 m/s and wavelength 150 km. What was the approximate period of these pulses?

A. 1 min

B. 3 min

C. 5 min

D. 15 min