Two large metal plates of area 1.4 m2 face each other. they are 4.8 cm apart and have equal but opposite charges on their inner surfaces. if the magnitude e of the electric field between the plates is 52 n/c, what is the magnitude of the charge on each plate? neglect edge effects.

The lid of a pressure cooker forms a nearly airtight seal. steam builds up pressure and increases temperature within the pressure cooker so that food cooks faster than it does in an ordinary pot. the system is defined as the pressure cooker and the water and steam within it. if 2.0 g of water is sealed in a pressure cooker and then vaporized by heating, and 5655 j must be added as heat to completely vaporize the water, what is the change in the system’s internal energy? answer in units of j.