When a pressure cooker is half filled with water, and heated to boiling point, then the pressure inside the cooker will?
- decrease, since only a fraction of the water molecules has changed to vapour
- remain constant, because the total number of water molecules has not changed
- increase, because the water molecules can now reach every part of the sealed tube
- decrease, since water boils under reduced pressure
-
increase, because the water vapour molecules now strike the walls of the tube more frequently because of their increased velocity
