Momentum of a system is only conserved when

Which type of front causes many hours of steady rain before that front passes a location?

Why do we use gibbs energy instead of considering the total entropy change when we are determining whether a process will occur?

Why do gases diffuse faster than liquids?

Why do radio waves diffract around buildings, while light waves do not?

A 15 wood block rests on table what is the force the table exerts on the wood block

In a summer storm the wind is blowing with a velocity of 8m/s north. Suddenly in 3 seconds, the winds velocity is 23m/s north. What is the winds acceleration?

How does a bicycle rider's energy of motion changes as the gain speed while riding down a hill? Options: A) It is lost. B) It increases. C) It remains the same. D) It is stored in the bicycle rider.

When is a sailboat the stand on vessel in relations to a recreational power boat?

What happens when a balloon is rubbed with a woollen cloth?

A child causes a wagon to accelerate by pulling it with a horizontal force. newton's third law says that the wagon exerts an equal and opposite force on the child. how can the wagon accelerate? (hint: draw a free-body diagram for each object.)