When you look at the isotopes of one element, the number of answers: changes, stays the same

Curious carl calculated the density of a cube to be 4.50 g/cm3. what is the density of the cube in g/l?

Explain how the energy of rubber ball is tranforned as it roll down a ramp. give evidence that the energy of the og the ball remains the same at all points on the ramp

This energy transformation diagram represents the energy of a skateboarder moving along a half-pipe. as she skates toward the top of the half-pipe, her original kinetic energy is converted to potential energy and friction. how much of the energy is potential?