Water flows through a multisectional pipe placed horizontally on the ground. the velocity is 3.0 m/s at the entrance and 2.1 m/s at the exit. what is the pressure difference between these two points? neglect friction.

James is trying to prove newton's 2nd law of motion. he tries to move four different objects with different masses, shapes, and sizes from point a to point b. the objects are a toy car, a car, a refrigerator, and a kitchen table. after some experimentation, he finds that force is dependent on the mass of the object, rather than it's size or shape. the object that takes the most force to move is the

The law of the conservation of momentum says that the total momentum of any closed and isolated system cannot

How many atoms of nitrogen are in the chemical formula ni(w on