Which is faster, light or sound? Explain.

2. A hanging chair is suspended on a spring from the ceiling. The 5880 N/m spring stretches from 15 cm long to 25 cm long when you sit in the chair a) How hard is the spring pulling to lift you? b) How hard does gravity pull down on you?

Least common shape for a galaxy is

At 5000-kg freight car runs into 10000-kg freight car at rest. they couple upon collision and move with a speed of 2 m/s. what was the initial speed of the 5000-kg car?

Technician A says that any cleaning chemical can be used to clean aluminum parts or components. Technician B says that most chemical cleaners are strong soaps called caustic materials. Which technician is correct?

The force between two moving objects that are touching

A force between two objects?

Two iron rods are placed horizontally, touching end-to-end. One end of one rod is heated. After some time, the other rod also feels warm to touch.

Which part of the motor is responsible for reversing the flow of current?

In a generator, as the magnet spins, opposite poles of the magnet push the electrons in opposite directions. This back-and-forth movement of electrons is called what? A) revolutions per minute B) direct current C) alternating current.

A train travels at a speed of 30 miles/hour and traveled a distance of 240 miles. How long did it take the train to complete its journey?