JR Macdonald Laboratory 2000 Summer Short Course: Introduction to Vacuum Science and Technology: ---------------------------------------------- Problem 1.1) How long does it take to evacuate a 1 gallon freezer bag with a 900 cu.in./min. vacuum pump to 1 Torr? Problem 1.2) How long does it take to evacuate a 4" diameter 20 ft long beam line with a 8 CFM pump to 1 Torr? How long does it take to evacuate it to 100 mTorr?