Cientists have observed a sudden explosion in the sun followed by rapid changes in the sun's brightness. which of these events would most likely occur due to this solar condition?

Excuse ! extra points plus ! super desperate ! the position of an object does not move relative to a reference point. relative to the reference point the object _. a.) is not moving. b.) is moving.

Oxygen undergoes an isentropic expansion from 120 degree c and 280 kpa absolute to 140 kpa absolute. determine the final temperature of the oxygen and the amount of work per kg of o_2 produced in the process if it is adiabatic.

Why should seat belts not be mandatory quick plz