Think about the Law of Conservation of Matter and Energy for a chemical reaction. What will weigh more?

A. The reactants always weigh more.

B. The reactants will weigh the same as the products.

C. It will depend on the type of reaction.

D. The products alway's weigh more.

What is the angular momentum of the bar about the axle?

The mass of a bowling ball is 10 kg and the mass of a ping pong ball is 0.015 kg. if the two objects are 5 meters apart, what is the gravitational force ?

The drag force, fd, imposed by the surrounding air on a vehicle moving with velocity v is given by fd = cdaρv 2/2 where cd is a constant called the drag coefficient, a is the projected frontal area of the vehicle, and ρ is the air density. an automobile is moving at v = 80 kilometers per hour with cd = 0.28, a = 2.3 m2, and ρ = 1.2 kg/m3.