A boy who is 1.5 meters tall is standing 15 meters away from a 6.5 meter wall. He throws a ball at a 45 degree angle. gravity is 10m/s2 with no air resistance. Find the minimum velocity needed in order for the ball to reach the wall. I dont know what formulas to use since im not given the time

Ahydroelectric plant takes energy from water and turns it into electrical energy. what are the transformations of energy in the water molecules that are used in the process of generating electricity this way?

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?

How many neutrons does plutonium -196 with an atomic number of 78.