When a .22-caliber rifl e is fi red, the expanding gas
Chapter , Problem 9(choose chapter or problem)
When a .22-caliber rifl e is fi red, the expanding gas from the burning gunpowder creates a pressure behind the bullet. This pressure causes the force that pushes the bullet through the barrel. The barrel has a length of 0.61 m and an opening whose radius is 2.8 3 1023 m. A bullet (mass 5 2.6 3 1023 kg) has a speed of 370 m/s after passing through this barrel. Ignore friction and determine the average pressure of the expanding gas
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