The front end of the car is crushing and absorbing which slows down the rest of the car

What practical value did astronomy offer to ancient civilizations?

Two positive charges are equal. which has more electric potential energy?

Afisherman notices that his boat is moving up and down periodically, owing to waves on the surface of the water. it takes a time of 2.70 s for the boat to travel from its highest point to its lowest, a total distance of 0.700 m. the fisherman sees that the wave crests are spaced a horizontal distance of 6.50 m apart. a. how fast are the waves traveling? b. what is the amplitude a of each wave?