In planning for the construction of our cannon we took into account the affects of pressure and 
volume. We determined that the best way to maximize the distance of the ball was to create a chamber for the pressure to build up in before reaching the ball. By keeping the pressure separate from the ball at first would give the combustion reaction time to build up enough pressure to launch the ball. We then had to decide what size the chambers should be. We figured that the pressure chamber should be around 2.5 inches and the barrel for the ball would be the length of the tennis ball can. For the pressure to be able to reach the barrel we would cut out a hole in the bottom of the barrel then tape the two 
chambers together. We also figured that the cannon need to be elevated, giving more distance to the travel of the ball, so we decided that we would need to make a stand with the left over parts from our two cans.
volume. We determined that the best way to maximize the distance of the ball was to create a chamber for the pressure to build up in before reaching the ball. By keeping the pressure separate from the ball at first would give the combustion reaction time to build up enough pressure to launch the ball. We then had to decide what size the chambers should be. We figured that the pressure chamber should be around 2.5 inches and the barrel for the ball would be the length of the tennis ball can. For the pressure to be able to reach the barrel we would cut out a hole in the bottom of the barrel then tape the two 
chambers together. We also figured that the cannon need to be elevated, giving more distance to the travel of the ball, so we decided that we would need to make a stand with the left over parts from our two cans.Design:
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