Water Waves: Osaid Mian 8B

Research

Question:

Does a change in the depth of water

affect 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 less

friction slowing the waves down.

Independent Variable: Depth of water in centimeters (cm)

Dependent Variable: Speed of

waves in seconds (s)

Controlled Variable: Same container, same water temperature, same timing method and

same drop angle.

Apparatus:

1.

1 Container

2.

1L

of water

3.

A

jug

4.

A

small marker

5.

A

Stopwatch

6.

A

1m ruler

Method:

1-Measure the length of the container, you will need this

information to calculate the velocity after the experiment.

2- Place the water into the container and make sure you fill up 1

cm of water from the bottom

3- Place the tissue box on the right side under the container like

the photo above.

4-Slowly pull out the tissue box and let the container drop

5. Simultaneously start the timer once the container touches the

ground.

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 of

6.5 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 information

to find out the averages and

The velocity which will be explained below.

*Safety precautions* Watch out

for water spillages which could cause minor to major damage

Raw

Data:

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= 40cm

4 wave cycles

Processed

Data:

Velocity

1cm

5.52 cm/sec

2cm

6.42 cm/sec

3cm

7.25 cm/sec

4cm

8.70 cm/sec

Graph

Conclusion

From the

results it can be seen that as you increase the depth of the water, the

velocity of the water will also increase.

As you

can clearly see the graph clearly shows that when you increase the depth of

water from 1 to 4 cm the velocity of a wave changed from 5.52 cm/s to 8.70

cm/s. This clearly is a linear relationship and that the ratios are equal. We

could confirm that these velocities are accurate by looking at the graph to see

if it makes sense and do the same depth of water 5 times which we did to add

accuracy to our experiment.

The

results agree with my beginning hypothesis which to summarize states that “the speed of the

water waves will increase as well”

The graph also

relates to my hypothesis. It shows that as you increase water depth the speed

of the wave increase too. The average results seem to be on point and the

linear line doesn’t seem to have any anomalies.

Evaluation

If I was to do the

experiment again I would certainly increase the range of my independent

variable which is the depth of water to make sure my results would be more

reliable and accurate as well as to check if the ratio between depth and

velocity still are proportional. I think this will be a big step up, which is

why 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 is

the main limitation from making this into a near perfect experiment because of

the data we could’ve collected.

To fix limitation we could’ve got a bigger

container because our one was too small which lead to us spilling water which

is something that can be very dangerous. Getting a bigger container could help

us record results with higher depths to further extend our investigation and

add accuracy and precision to our experiment.