An athlete, swimming at a constant speed, covers a distance of 221 m in a time period of 3 minutes and 38 seconds. The drag force exerted by the water on the swimmer is 71.0 N. What is the power the swimmer must provide to overcome that drag force. (in W)

If you want to change the pitch of a sound, you have to change the

The boy of mass 30 kg is at r1= 2 meters from the fulcrum. of the girl is 45 kg, at what r2 must she sit so that they are balanced ?

Part 1: a magnetic levitation or maglev train rides rails without touching them. explain how this works using your data. include the appropriate magnet drawing in your answer. part 2: two objects are near a bar magnet. one is about 1 cm away, while the other is 6 cm away. compare and contrast the magnetic force that affects each object. use your data to answer the question