Help!! what are the blanks???

Transfer chemicals from one location to another to weather objects. a-water b-physical weathering c-chemical weathering

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

Suppose you increase your walking speed from 7 m/s to 13 m/s in a period of 2 s. what is your acceleration?