3. There are two cylindrical tubes (each 5 cm in length) leading into a common, 100 liter vacuum chamber. One tube has a diameter of 2 cm. The other tube has a diameter of 0.5 cm. The viscosity of nitrogen at 760 Torr and 0 deg. C. is 166 micropoise. a) (10 points) calculate the total conductance (in l/sec) for pumping the system containing only nitrogen, if the inside pressure is 1 torr and the outside pressure is 760 Torr. b) (10 points) calculate the total conductance (in l/sec) for pumping the system containing only nitrogen, if the inside pressure is 10 torr and the outside pressure is 10 Torr. 100 I volume 2 cm diam. Pump P = 1 torr 0.5 cm diam. 100 I volume 2 cm diam. P = 10 torr 0.5 cm diam. P = 10-8 torr Pump