Why do scientists call the asthenosphere the "plastic mantle"?

earth science related

Find the momentum for a 2.6-kg brick parachuting straight downward at a constant speed of 8.4 m/s .

The step-down transformer gives a current of 10a at 24v if the primary voltage is 240v calculate the 1_primary current 2_the power input 3_the power output

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