Water is useful for reducing friction between objects. however, you also learned that (due to friction) moving water causes rough rocks to become smooth. how can this be?

What is the mass of the same rock on the earth

The experiment was repeated many years later but the gases were mixed in a different type of container. a white solid was obtained which was xenon fluoride. predict whether you think 1) krypton and 2) radon will react with fluorine. explain reasons for your predictions

What is the measurement of how fast an object moves relative to a reference point?