A cruise ship travels directly toward the dock with a velocity of 12 m/s relative to the water. A passenger walks 2 m/s in the same direction as the picture below shows. How far has the passenger walked relative to the dock after 3 seconds?

What is the difference between mass density and weight density?

A980-kg sports car collides into the rear end of a 2300-kg suv stopped at a red light. the bumpers lock, the brakes are locked, and the two cars skid forward 2.6m before stopping. the police officer, estimating the coefficient of kinetic friction between tires and road to be 0.80, calculates the speed of the sports car at impact. what was that speed?

Why do metals "give up" their valence electrons?