At each corner of a square of side there are point charges of magnitude Q, 2Q, 3Q, and 4Qa)Determine the magnitude of the force on the charge 2Q. Express your answer in terms of Coulomb's constant k, Q, and l. Express your answer using two significant figuresb)Determine the direction of the force on the charge 2Q Express your answer using two significant figures

Acylinder with a movable piston contains 11.7 moles of a monatomic ideal gas at a pressure of 1.32×10^5 pa. the gas is initially at a temperature of 300 k. an electric heater adds 43200 j of energy into the gas while the piston moves in such a way that the pressure remains constant. cp=20.79 j k^−1 mol^−1 for a monatomic ideal gas, and that the number of gas molecules is equal to avogadro's number (6.022×10^23) times the number of moles of the gas. (a) what is the temperature of the gas after the energy is added? (b) what is the change in volume of the gas? (c) how much work is done by the gas during this process?

The energy equivalent of the rest mass of an electron is

The total amount of energy contained in an object