How metronome work in theory physic? Can you help me figured it out, please?

Abearing is designed to a reduce friction b. support a load c.guide moving parts such as wheels, shafts and pivots d. all of the above

Free runners jump long distances and land on the ground or a wall. how do they apply newton’s second law to lessen the force of impact?

The experiment was repeated many years later but the gases were mixed in a different type of container. a white solid was obtained which was xenon fluoride. predict whether you think 1) krypton and 2) radon will react with fluorine. explain reasons for your predictions