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# Find out how the speed of a wave changes as it travels through water of different depths.

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Introduction

Investigation report Planning Aim I want to find out how the speed of a wave changes as it travels through water of different depths. Factors The factors what I think will affect in my investigation are: > Height of drop > Depth of water A fair test To do a fair test I must only change one factor at a time. The factors that I will keep the same are: > The equipment > Number of times > Height of drop The one factor that I will change is the depth of water. Prediction I predict that the shallower the water the slower the wave, the deeper the water the faster the wave. I think this because if the water becomes deeper the wave will travel a lot faster. ...read more.

Middle

I will let the wave travel to the far end of the tray and use the stop watch to time how long it takes to go to the other end and back three times. (This means the wave will travel six times the length of the tray). I will repeat this by using water that is 1.5cm, 2cm, 2.5cm and 3cm deep. Results Water depth (cm) Distance travelled (m) Time taken (seconds) Speed (m/s) 1cm (Average) (15.13) (0.85) 1st 2.4 6.50 0.36 2nd 2.4 6.43 0.37 3rd 2.4 6.60 0.36 1.5m (Average) (11.94) (1.07) 1st 2.4 5.14 0.46 2nd 2.4 5.12 0.46 3rd 2.4 5.04 0.47 2cm (Average) (11) (1.17) 1st 2.4 4.74 0.50 2nd 2.4 4.68 0.51 3rd 2.4 4.74 0.50 2.5cm (Average) ...read more.

Conclusion

This shows that the speed of the wave is increasing. My results match my predictions accurately as I predicted that the change in the wavelength of the waves will cause the change in speed. This is what my results show. Evaluating my evidence I think that the way I carried out my investigation was correct, I got similar results to what I predicted. In my investigation my results are fairly accurate as I carried out my investigation carefully. If I had to use my results as evidence, I think they show that the deeper the water the longer the speed. The shallower the water the quicker the speed. If I did my investigation again, I would improve it by; > Measuring the exact amount of water > Measuring the exact cm every time > Making sure the timing is accurate By Stacey Longley ...read more.

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