# Water is less friction slowing the waves down.

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Last updated: July 16, 2019

Water Waves:                                                                          Osaid Mian 8BResearchQuestion:Does a change in the depth of wateraffect the speed of the water wave?  Hypothesis:If you increase the depth of water,then the speed of the water waves will increase as well because there is lessfriction slowing the waves down.  Independent Variable: Depth of water in centimeters (cm) Dependent Variable: Speed ofwaves in seconds (s) Controlled Variable: Same container, same water temperature, same timing method andsame drop angle.  Apparatus: 1.    1  Container2.    1Lof water3.

Ajug4.    Asmall marker5.    AStopwatch6.    A 1m ruler            Method: 1-Measure the length of the container, you will need thisinformation to calculate the velocity after the experiment.

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2- Place the water into the container and make sure you fill up 1cm of water from the bottom 3- Place the tissue box on the right side under the container likethe photo above. 4-Slowly pull out the tissue box and let the container drop 5. Simultaneously start the timer once the container touches theground. 6. Wait until the waves reach from left to right and back 4 times(4 wave cycles) 7. Record your time from the stopwatch (should be in the range of6.5 seconds to 8.5 seconds)  8.

Repeat steps (2-6), 4 more times. 9. Add 1 more cm of water into the container and repeat steps(2-6) 5 times. 10. Repeat step 8, 2 more times. 11.

Record your information in a table and process the informationto find out the averages and The velocity which will be explained below. *Safety precautions* Watch outfor water spillages which could cause minor to major damage RawData: 1cm 2cm 3cm 4cm 7.83 6.35 5.16 4.65 7.09 6.06 5.

43 4.65 6.89 6.01 5.30 4.

53 6.97 6.32 5.66 4.64 7.42 6.43 6.

01 4.51 Avg= 7.24 Avg=6.23 Avg=5.

51 Avg=4.60  Length of container= 40cm4 wave cycles        ProcessedData: Velocity   1cm 5.52 cm/sec 2cm 6.42 cm/sec 3cm 7.25 cm/sec 4cm 8.70 cm/sec  Graph             Conclusion From theresults it can be seen that as you increase the depth of the water, thevelocity of the water will also increase. As youcan clearly see the graph clearly shows that when you increase the depth ofwater from 1 to 4 cm the velocity of a wave changed from 5.

52 cm/s to 8.70cm/s. This clearly is a linear relationship and that the ratios are equal. Wecould confirm that these velocities are accurate by looking at the graph to seeif it makes sense and do the same depth of water 5 times which we did to addaccuracy to our experiment.

Theresults agree with my beginning hypothesis which to summarize states that “the speed of thewater waves will increase as well” The graph alsorelates to my hypothesis. It shows that as you increase water depth the speedof the wave increase too. The average results seem to be on point and thelinear line doesn’t seem to have any anomalies.  Evaluation If I was to do theexperiment again I would certainly increase the range of my independentvariable which is the depth of water to make sure my results would be morereliable and accurate as well as to check if the ratio between depth andvelocity still are proportional. I think this will be a big step up, which iswhy I also think that the depth is my variable with the most uncertainty. To extend this investigation I think I could Furthermore, again, the depth of the water isthe main limitation from making this into a near perfect experiment because ofthe data we could’ve collected.

To fix limitation we could’ve got a biggercontainer because our one was too small which lead to us spilling water whichis something that can be very dangerous. Getting a bigger container could helpus record results with higher depths to further extend our investigation andadd accuracy and precision to our experiment.