Is pressure cooker an example of the application of Charles' law?
yes pressure cooker is an example for both charles' law and boyle's.
under constant volume temperature is directly proportional to pressure, where the pressure is directly proportional to temperature. so when the stove heats the cooker it increase the in the pressure which in turn increase the internal temprature and cooks the food faster....
Yes, there are plenty of stores that still sell electric pressure cookers. Target, for example, is current selling a Deni Electric Pressure Cooker - 9700. This cooker can be used to slow cook, steam, and brown. For more information on this cooker, visit http://www.target.com/Deni-Electric-Pressure-Cooker-9700/dp/B000A6JKZK
The pressure inside the cooker exerts pressure on the lid making in tight once the pressure is released there is no friction onto he lid to hold it the internal pressure is more than the outside pressure holding it on. Another example in reverse is when you have syringe (without needle) and you suck it against the skin it is hard to get off but when the pressure is released it comes off easily