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This question is about waves - Edexcel - GCSE Physics Combined Science - Question 2 - 2022 - Paper 1

Question 2

This question is about waves. (a) Figure 3 is a diagram of a water wave in a ripple tank. 1. State the number of crests of the wave between P and Q. 2. The distan... show full transcript

Worked Solution & Example Answer:This question is about waves - Edexcel - GCSE Physics Combined Science - Question 2 - 2022 - Paper 1

Step 1

State the number of crests of the wave between P and Q.

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Answer

To find the number of crests between points P and Q, we visually count each crest present in the diagram. There are a total of 12 crests in this section of the wave.

Step 2

The distance between P and Q is 42 cm. Calculate the wavelength of the water wave in Figure 3.

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Answer

Given the distance between points P and Q is 42 cm and the number of crests counted is 12, we can determine the wavelength. The wavelength is calculated using the formula:

$ext{wavelength} = rac{ ext{distance}}{ ext{number of crests}}$

Substituting the values into the formula:

$ext{wavelength} = rac{42 ext{ cm}}{12} = 3.5 ext{ cm}$

Thus, the wavelength of the water wave is 3.5 cm.

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