a human body can only take a maximum sustained deceleration of 500 meters per second squared. how much time in seconds would it take superman to slow down the train from a blistering speed of 100 meters per second?

Jet streams are relatively narrow bands of strong wind in the upper levels of the atmosphere. the winds blow from west to east in jet streams but the flow often shifts to the north and south. jet streams follow the boundaries between hot and cold air. the earth's rotation is responsible for the jet stream as well.