3. Think back to the Key Question at the start of the section. A person is pedalling a bicycle. What do you need to know to find the mechanical
efficiency of this system?

Use the right-hand rule for magnetic force to determine the charge on the moving particle. this is a charge.

Aplayground merry-go-round has a radius of 4.6 m and a moment of inertia of 200 kg-m2 and turns with negligible friction about a vertical axle through its center. a child applies a 26.0 n force tangentially to the edge of the merry-go-round for 15.0 seconds. if the merry-go-round is initially at rest, how much work did the child do on the merry-go-round?

Ihave this 50 question test the layer of earth's atmosphere where atoms and molecules escape into space is referred to as the a) exosphere b) ionosphere. c) mesosphere d) thermosphere