2. Hot Dog Launching Lab 10/6/14By Lavanya A.

4. Our Claim: When we tested our 3 rd variable adding 2 ketchup packets, We got very good results. This was our best test because it added weight to the hot dog, which was kind of like a substitute for the balls used by the other tables, because those balls were meant to close up the air coming out of the launcher, or make the air not have pressure on the hot dog, just the ball. When we added the ketchup packets, we made the package bulkier, so it fit in the open space perfectly, and no air escaped from the launcher as the hot dog was shot. We used 20 psi because in our previous variable we had tested that, and our results had improved a lot in that test. I had predicted that the ketchup packets wouldn’t make a difference because of it’s weight, but it wasn’t the weight that changed the results, it was the size. Trial 1Trial 2Average 86 feet92 feet89 feet Trial 1Trial 2Average 99 feet131 feet 115 feet Control TestVariable 3: +2 ketchup packets

5. Constants- the things that stay the same in an experiment Outdoor Conditions- If the weather is different during a shoot, the results will change. If it’s windy it could blow the hot dog away. If it’s hailing, it could know one down. Why are they important? They assure that nothing will change between different tests and that data will be consistent They provide things to change in the experiment for a variable test To have a fair experiment you… Always need one or more constant Can check to see if other tables have similar data

6. There were many different setups found in each group’s final launch. Some of the setups helped the hot dog travel farther and have greater accuracy, yet some setups had the opposite effect. Here are some of the tables’ different setups. Table 1- In our setup, we wrapped the hot dog and the 3 ketchup packets in 12 inches of aluminum foil and then secured it with 3 rubber bands. Our setup made the hot dog go farther and almost perfect accurately, because of it’s bulkiness. Table 4- In their setup, they wrapped the hot dog by itself in the aluminum foil tightly. They added a blue ball in, which they put in before the hot dog so the air could be pressured on to the ball and not the hot dog. The setup allowed the hot dog to go at an extremely far distance, and have perfect accuracy. Table 5&6- In this setup, they also added a ball, yet it was a little different. While Table 4’s was kind of hollow, there’s was denser, and not hollow. This setup gave their hot dog also perfect accuracy, yet it didn’t quite travel as far as Table 4’s.

7. If we could have had more time, I wonder what would happen if we also tested with a ball, and/or a higher psi?