An aluminum tea kettle with mass 1.30 kg and containing 1.80 kg of water is placed on a stove. if no heat is lost to the surroundings, how much heat must be added to raise the temperature from 20.0 ∘c to 82.0 ∘c ? q = j

Four objects each with charge +2.0×10−7c are located at the corners of a square whose sides are 2.0 m long. part a what quantities can be determined using this information? check all that apply. the electric force on a charged object placed at the center of the square. the mass of each object. the total electric potential energy of the system consisting of the four charged objects. part b find the electric force on a charged object placed at the center of the square.