Change of state that occurs when hailstones form

What happens to light waves from a star as the star moves away from earth?

What is the magnitude of the resultant vector round your answer to the nearest tenth

Apulley system is used to lift a 2,000 newton engine up a distance of 3 meters. the operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor. to lift the engine 3 meters, the operator must pull a total of 30 meters of chain through the pulley system. what is the value of di?