4. A monatomic gas is inside a thin metal shell at a constant temperature. In 20 hours, the pressure inside the shell dropped from 0.5 atm to 0.36 atm. The pressure outside is zero. Calculate the time it takes for the pressure inside the shell to drop to 0.1 atm.

If you do not open the file - install the RAR archiver. Inside the archive you will find a solution in Word format.