A bicycle can be used to generate electric power by attaching a loop to the axle and letting it rotate in a magnetic field. Suppose such a device is attached to a bicycle with a 65 cm diameter wheel.
(a) What is the velocity (in m/s) of the bicycle if the generator's angular velocity is 63 rad/s?
(b) What is the maximum emf of the generator when the bicycle moves at 3.5 m/s, noting that it was 17 V under the original conditions?

Answer asap! the weather patterns on earth are shown in this image. explain why there are convection currents; why there are hotter and colder parts of earth.

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.

Two 2.0-cm-diameter disks face each other, 1.0 mm apart. they are charged to ±10 nc. what is the electric field strength between the disks? a proton is shot from the negative disk toward the positive disk. what launch speed must the proton have to just barely reach the positive disk?