Apassenger on a ferris wheel moves in a vertical circle at a constant speed. are the forces on her balanced?

a. yes, the speed it constant.
b. no, the direction of the net force does not change.
c. no, there is an inward net force.
d. yes, it moves in a vertical circle.

While goofing off at the ice skating rink, a student takes off her shoes and places each of them on the ice. her friend, a hockey player, then shoots a hockey puck at each shoe. the first puck immediately comes to rest after it collides with the left shoe. the second puck rebounds after it collides with the right shoe. if each hockey puck has the same incoming speed, which shoe has greater speed after the collision? the right shoe. both shoes have the same speed. the left shoe.

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

In a hydrogen molecule there are a total of four charges, 2 protons in the two nuclei, and 2 electrons. how many unique charge-pairs are there (without double counting)?