K.C.S.E Physics Q & A - MODEL 2002PP2QN05

K.C.S.E Physics Q & A - MODEL 2002PP2QN05

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 a) Fig 6.1 shows the cross- section of a ripple tank full of water. A piece of cork floats on the surface of the water as shown. Fig 6 II shows the water surface viewed from above. A straight edge vibrator placed at the end A of ripple tank generates water waves, which travel towards end B as shown.

(i) Identify the type of waves generated on the water surface.
(ii) It is observed that as the waves pass the cork, there is no net movement on the cork. Explain this observation
(iii) A student estimates that successive waves pass the cork every 0.20 seconds. If the speed of the waves is 0.30 ms^-1 , determine the frequency and wavelength of the waves at that point.
iv) In the space provided, sketch the wave fronts as viewed from a point above the ripple tank.

v) Explain the answer in part (iv) above
b) A tuning fork is sounded at the mouth of a pipe whose one end is closed with a moveable piston. Resonance is observed successively when the piston is 77cm and then at 129 cm. If the speed of sound in air is 340ms ^-1, determine the frequency of the tuning fork.

answers