Two people are moving a heavy desk. One person pulls to the right with a force of 25 Newtons, while the other pushes to the right with a force of 50 Newtons. There is also 20 Newtons of friction pointing to the left. What is the net force on the desk?

The magnetic field inside a superconducting solenoid is 4.50 t. the solenoid has an inner diameter of 6.20 cm and a length of 26.0 cm. determine (a) the magnetic energy density in the field and (b) the energy stored in the magnetic field within the solenoid.

What distance does a car travel as its speed changes from 0 to 20 m/s in 17 s at constant acceleration?

Select light for the type of wave, adjust the wavelength so that the light is red, and increase the amplitude of the light to the max. then, select the start button at the source location to begin producing the waves. light is a form of electromagnetic wave, containing oscillating electric and magnetic fields. the wave amplitude detector mentioned above shows how the electric field oscillates in time at the location of the probe. the amplitude of the wave at the location of the probe is equal to the maximum electric field measured. how does the amplitude of the wave depend on the distance from the source?