A large box is pushed with an applied force of 170 N. There is a friction force of 50 N acting on the moving box. What is the Net Force acting on the box (Net force is the Sum of the forces)

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

Electromagnetic induction. a coil of wire contains n turns and has an electrical resistance r. the radius of each turn is a. initially, inside the coil there exists a uniform magnetic field of magnitude b0 parallel to the axis of the coil. the magnetic field is then reduced slowly. the current induced in the coil is i. how long does it take for the magnitude of the uniform field to drop to zero?

The diagram shows a wave. the quantity shown is the amplitude. this quantity is directly proportional to which of these other quantities? a) energy b) frequency c) period d) wavelength