Toothpick Project Progress

More Fun with Waves Lab

Part 3: Interference of Transverse Waves

1. If the two wave pulses are on the same side of the spring, what happens when the two waves meet in the middle of the spring? 
• When the two wave pulses meet in the middle they bounce back to the directions they came from.
2. If the two wave pulses are on opposite sides of the spring describe what happens when they meet in the middle of the spring.
• When the two wave pulses meet in the middle, they bounce back and change the side they were originally on. 

Part 4: Periodic Transverse Waves

1. How does the length of the waves that you produce depend on how fast you are vibrating your hand?
• When you vibrate your hand faster, you get shorter waves and when you vibrate your hand slower, you get longer waves.
2. Does the speed at which the wave travels down the spring depend on how fast you are vibrating your hand?
• We timed the waves three times and used the average of the three to find the velocity. When we calculated the velocity of the fast vibration we got 5.85 m/s, and when we calculated the velocity of the slow vibration we got 5.63 m/s. From our data, it seems that the speed is slightly more when you vibrate your hand fast, but I think that to be more accurate, we should've done more trials.

Part 5: Standing Waves

1. Record the time it takes to complete ten cycles. Calculate the  frequency, period, wavelength, and speed of the wave. (One Hump)
• Time: 19.12 seconds
• Frequency: 0.52 Hz
• Period: 1.912s
• Wavelength: 1.21m
• Speed: 0.628 m/s
2. Record the time it takes for the wave to complete ten cycles. Calculate the frequency, period, wavelength, and speed of the wave. (Two Humps)
• Time: 9.41 seconds
• Frequency: 1.063 Hz
• Period: 0.941s
• Wavelength: 1.204m
• Speed: 1.28 m/s
3. Record the time it takes for the wave to complete ten cycles. Calculate the frequency, period, wavelength, and speed of the wave. (Three Humps)
• Time: 4.60
• Frequency: 2.17 Hz
• Period: 0.46s
• Wavelength: 1.203m
• Speed:  2.61 m/s

Intro to Waves Lab

1. Describe in words and drawings what you see after releasing the spring.
• There seems to be a wave that bounces back and forth and how how far it goes depends on how much you compress it.
2. What happens to the wave when it reaches the other end of the spring?
• It bounces back.
3. Describe in words and drawings what you see after releasing the spring.
• The wave hits goes towards the other end and it creates a kind of dent as it passes along the spring.
4. Describe in words and drawings what happens to the waves when it reaches the other end of the spring.
• The wave hits the other end and bounces back, but it never comes completely back, it seems to fade away somewhere in the middle of the spring.
5. Does the size of the wave change as it travels along the spring? Describe both its amplitude and wavelength.
• Yes it does. After it hits the other end, the size of the wave gets a lot smaller. As you increase the amplitude, the waves get bigger, and when you decrease it, the waves get smaller. The wavelength seems to stay the same.
6. Do you think changing the amplitude of the wave will change the velocity?
• No it doesn't.
7. Do you think changing the wavelength will change its velocity?
• No, it doesn't change the velocity.
8. Do you think stretching or shortening the length of the spring will change its velocity?
• Stretching or shortening the spring length can make it either faster or slower. To make it slower, you make it shorter, and to make it faster, you make it longer.

Cultural Convention Submission

For Cultural Convention, I would like to submit my self portrait. I think it would stand out because I used a unique medium - strips of cloth and embroidered string. Another different thing about this is that I don't use natural colours; in contrast to a lot of realistic pieces, I use funky colours to show the shading of the face. So far, this has been one of the most challenging piece I have ever created because it was the first time I had tried to create something by sewing it. I have probably spent more time on this piece than any others I have done in the past. In my opinion, this would be perfect to represent SAS at Cultural Convention because I doubt something like this has been done before.