Question

If a sine wave of amplitude 5 cm, wavelength 3 cm and frequency 10 Hz moves in space, what is its speed

• A. 3 m/s
• B. 0.3 m/s
• C. 0.6 m/s
• D. 0.03 m/s

Answer 1

The correct option is B 0.3 m/s

The speed of the wave is $v=f\lambda =10\times 3\times {10}^{-2}=0.3m/s$
The correct option is (b)