If an airplane is headed due north at 120 km/hr directly into a headwind (due south) of 15km/hr, what is the resultant velocity of the aircraft? Only give the magnitude as your answer.

Apositive point charge q is fixed on a very large horizontal frictionless tabletop. a second positive point charge q is released from rest near the stationary charge and is free to move. which statement best describes the motion of q after it is released? assume q stays on the table

Spend time observing or thinking about events that involve matter and energy. which events can you explain? which events can’t you explain?

How would doubling the made of an object change the objects potential energy