The electric field intensity at a particular location surrounding a Van de Graaff generator is 2.15E3 N/C. Determine the magnitude of the force that this field would exert upon a ball with 3.85E-7 C of charge when positioned at this location. Round to the appropriate number of sig figs, and put your answer in scientific notation, just like these examples: 2.55E-6 or 6.009E6

As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.

The energy released by a nuclear fusion reaction is produced when

Where should a carbon monoxide detector be mounted?