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GCSE Questions - Waves Q6.The diagram shows a ripple tank that a student used to investigate water waves.
(a) The student adjusted the speed of the motor so that the bar hit the water more times each second. What happened to the frequency of the waves produced? The frequency increased [1 mark] (b) Describe how the frequency of the water waves in the ripple tank can be measured. You need to count how many waves pass a point in one second. That is best done by counting the number of waves that pass a point in a set time If you count how many pass a point in a minute and divide the answer by 60 - this will reduce errors compared to picking a small time interval. You would then need to repeat your measurement a couple of times and find an average. [4 marks] (c) The student measured the frequency of the water waves as 5.0 hertz. ( Calculate the period of the water waves. T = 1/f T = 1/5.0 T = 0.20 [3 marks] (Total 8 marks) |
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I am amazed the student could count that fast... but strange things happen in exam question land!)
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