How much heat must be supplied to a 575.0 g iron pan to raise the temperature of the pan from 23.0°C to 98.0 °C. (Answer in Joules)

Apebble is thrown into a calm lake, ripples are formed from the center and move outward. the water particles in the lake travel in a circular pattern that moves up and down on the surface of a lake, and the energy travels a) diagonally. b) downward. c) horizontally. d) upward.

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up

Two balls, each with a mass of 0.5 kg, collide on a pool table. is the law of conservation of momentum satisfied in the collision? explain why or why not