1 ) What is the speed of a wave whose frequency and wavelength are 600.0 Hz and

Question

1 ) What is the speed of a wave whose frequency and wavelength are 600.0 Hz and 0.600 m, respectively? unit in m/s

2 ) What is the frequency of a wave whose speed and wavelength are 120 m/s and 30.0 cm, respectively? unit in HZ

3 ) A fisherman notices a buoy bobbing up and down in the water in ripples produced by waves from a passing speedboat. These waves travel at 2.8 m/s and have a wavelength of 8.2 m. At what frequency does the buoy bob up and down? unit in HZ

4 ) What is the speed of the wave represented by
y(x, t) = A sin(kx - ?t),
where k = 4.7 rad/cm and ? = 4.0 rad/s? unit in cm/s

Explanation / Answer

1 .

speed= v = 600 * 0.6 = 360 m /s ;

2 .

frequency = speed / =   120 / 0.3 = 400 Hz .

3 .

frequenxcy = 2.8 / 8.2 = 0.34146 Hz .

4 .

k c = ;

c = / k ;

c = 4 / ( 4.7 / ( 1e-2 ) ) = 8.510 e -3 m / s ;

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