Why did places like harvard support and perform lobotomies?

You are sitting on the beach and wondering about the properties of mechanical waves. describe them in terms of ocean waves.

What causes the formation of ocean currents?

A6.0-kilogram cart initially traveling at 4.0 meters per second east accelerates uniformly at 0.50 meter per second squared east for 3.0 seconds. what is the speed of the cart at the end of this 3.0 second interval? (1) 1.5 m/s (3) 3.0 m/s (2) 5.5 m/s (4) 7.0 m/s