Can someone please help me with these three problems ASAP .. I have to get it done right now.. I have to get it done

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

Examine the equation. 23490th→23088ra+42he what kind of barrier would you need to block the radioactive particles from this reaction? a.a piece of paper b.a sheet of aluminum foil c. a two-inch block of lead d. a solid concrete block

Amira pulls a 3 pound wagon 4 feet. how much work has she done?