Design It Clean - Varanasi, India
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In this project, we were to construct a filtration system to filter out certain contaminants specific to our assigned location. My groups location was Varanasi, India. The locals have little access to clean water because The Ganges River is the main water source, but unfortunately, it contains much human waste, specifically, Salmonella and e coli.
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The Rocket Project
Hypothesis: If the mass affects the height the, adding mass to the rocket will decrease the height.Because a=f/m so if the mass is doubled, it will require twice the force to reach the same height.The Law: My rocket was constructed out of two one liter bottles that were spliced together designed to be lightweight and low drag. I specifically designed it to be small and light to work well with a limitedamount of thrust. Instead of using a bulbous two liter bottle with a large diameter, I spliced two one liter bottles together. This is the same amount of area to hold pressure, but it is significantly moreaerodynamic.The Wil: My rocket was designed to be heavy and high drag. I completed this by covering the wholething in duct tape. Mine was larger and didn't fly well. However, while planning out how I was going tomake my rocket, I did include logic into my reasoning. For instance, I about doubled the inside of therocket with knowledge that the more space for pressure would increase the power pushing upwards--toinfinity and beyond.We chose to test how the mass affects the height because we wanted to check that it is true that arocket with doubled the weight will need doubled the force than a rocket with half the weight to go thesame height.Question: Does the weight of the rocket affect the velocity?TestingWhen testing, you need to change one variable and keep all other variables the same. Since we weretesting mass, we had to keep water volume, pressure, and shape the same.● the rocket--we only used The Law and added weight to it when necessary● 500mL of water● 50PSIWe did 3 tests with no extra mass and then did 3 tests with 30% added mass and recorded the angle ofelevation, distance from launcher, and calculated the height for the six tests.In this test, we couldn't keep every variable under control, such as wind.
Results No added mass 30% added massTest 1 20m 9mTest 2 28m 11mTest 3 25m 10mI chose to graph the data like this because I thought that using a column graph was an efficient way toshow this data because you easily see the difference in height between the two sets of rockets.ConclusionIn the end, our result ended up proving our hypothesis to be correct. Even though we used 30% addedmass instead of double, it still showed that adding any mass would not allow the rocket to reach as highof a height than rocket with no added mass. Testing that we did early on helped us to realize that lightrockets did the best. Something that I would tell another student doing this project would be make alightweight rocket and don't use glue from Kroger's. Use the stuff the teacher gives you because itactually works.