Shaun Prepares a solution of Potassium Hydroxide. calculate the mass of Potassium hydroxide which is needed to prepare a 400cm³ of a solution of 0.15mol. dm³​

What energy conversion occurs when a sling shot is used to shoot a rock across the room? (2 points) question 2 options: 1) stored mechanical energy is converted to mechanical energy. 2) stored mechanical energy is converted to radiant energy. 3) gravitational energy is converted to radiant energy. 4) gravitational energy is converted to mechanical energy.