Contained gases under pressure can exert an enormous amount of force on an object. This is the fundamental principle behind this project. Two separate experiments with pressure were performed with this project. The first one consisted of using an air compressor to pressurize air into the rear chamber of the cannon. When the chamber reached the desired pressure the ball valve would be turned, causing the air to rush out and accelerate a ping pong ball through the shaft of the cannon. When compressed to 80 psi the air exerted a force of 660 newtons to the ping pong ball. The minuscule mass of the ping ball at only 2.7 grams means that this force accelerated the ball at over 200,000 m/s^2. However this acceleration is not actually achieved due to the large amount of drag force present in the chamber. In a separate experiment this drag force was removed by creating a vacuum chamber in the pipe. A vacuum pump was used to remove nearly all air inside the tube. The ends of the pipe were sealed with cellophane, and then when all air was removed from the pipe the cellophane was punctured. This causes atmospheric gases to rush into the pipe accelerating the ping pong ball with nearly zero drag force. The lack of an opposing drag force allowed the ping pong ball to reach speeds greater than the speed of sound.