Guiding Question: How does the medium change the speed of the wave?
Hypothesis: I think the denser the liquid the slower the wave.
Materials:
Procedure:
Data Analysis:
Conclusion:
Through this experiment I found that the denser the liquid is, the smaller the wavelength and slower the wave. I support this because with water, the lest dense liquid, the average speed was around 8.5 cm/s and the average wavelength was around 2.8 cm. In the sweet water, which was the 2 densest liquid the average speed of 5.5 cm/s and a wavelength around 1.8 cm. For the sunflower oil, the densest liquid, its average speed was 4 cm/s and wavelength 1.25 cm.
Further Inquiry:
If I was to do this experiment again I would use more mediums and include things like ropes. This way I could see the difference between mediums much better and this way I might be able to prove myself wrong and that's good because in the process I would learn more while making a bit of a mess.
Hypothesis: I think the denser the liquid the slower the wave.
Materials:
- Water
- Sunflower Oil
- Sugar
- Tub
- Timer
- Recording System
- Help From a Friend
- A half and inch diameter tapping tool
- Ruler
- Tape
Procedure:
- Take your tub and tape you ruler onto the bottom, putting the 1 on the cm side facing you.
- Fill you tub with about 3 quarters full with water.
- Set your timer for 10 seconds.
- Ask you friend to count the wavelength.
- Start tapping the water with your tapping too and count the frequency.
- When 10 seconds are up record the wavelength and frequency and then find out the speed and record that too.
- Do 3 tests before switching mediums.
- Put sugar in until the water is sticky.
- Repeat the steps 3 to 7.
- Then dump the water and pour in the sunflower oil.
- Do the steps from 3 to 7 again.
- Your experiment is done.
Data Analysis:
| Water | Sweet water | Sun flower oil | |||||||
| Trial | Hz | Wave length | Speed | Hz | Wave length | Speed | Hz | Wave length | Speed |
| 1 | 3 Hz | 2.5 cm | 7.5 cms | 3 Hz | 2 cm | 6 cms | 3 Hz | 1 cm | 3 cms |
| 2 | 3 Hz | 3 cm | 9 cms | 3 Hz | 1.8 cm | 5.4 cms | 3 Hz | 2 cm | 6 cms |
| 3 | 3 Hz | 3.2 cm | 9.6 cms | 3 Hz | 1.7 cm | 5.1 cms | 3 Hz | .75 cm | 2.25 cms |
Conclusion:
Through this experiment I found that the denser the liquid is, the smaller the wavelength and slower the wave. I support this because with water, the lest dense liquid, the average speed was around 8.5 cm/s and the average wavelength was around 2.8 cm. In the sweet water, which was the 2 densest liquid the average speed of 5.5 cm/s and a wavelength around 1.8 cm. For the sunflower oil, the densest liquid, its average speed was 4 cm/s and wavelength 1.25 cm.
Further Inquiry:
If I was to do this experiment again I would use more mediums and include things like ropes. This way I could see the difference between mediums much better and this way I might be able to prove myself wrong and that's good because in the process I would learn more while making a bit of a mess.
You did well in designing this lab and collecting the data. However, your data analysis section was missing from the lab report. Your conclusion made sense and you were able to answer the guiding question. Overall, good job.
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