K.C.S.E Physics Q & A - MODEL 2018PP2QN19

K.C.S.E Physics Q & A - MODEL 2018PP2QN19

​Figure 8 shows two waves of nearly equal frequency produced simultaneously.

​On the space provided, sketch the resultant of the two waves (beats). 
(b) Figure 9(a) and 9(b) show barriers placed in the path of plane waves.

On each figure, sketch the pattern of waves after they pass the barrier.
(c) Figure 10 shows a displacement—distance graph for a certain wave motion.

​(i) Indicate on the figure with letters A and B any two points that are in phase.
(ii) Determine the:
(I) amplitude of the wave 
(II) wavelength of the wave 
(iii) Given that the frequency of the waves is 50 Hz, determine the:
(I) period 
(II) speed of the wave

answers