Water Waves: Osaid Mian 8B
Does a change in the depth of water
affect the speed of the water wave?
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.
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
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
Length of container= 40cm
4 wave cycles
results it can be seen that as you increase the depth of the water, the
velocity of the water will also increase.
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.
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.
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.