An irregular neutral conductor has a hollow cavity inside of it and is insulated from its surroundings. An excess charge of 17.0 nC is sprayed onto this conductor. Part A Find the charge on the inner surface of the conductor. a. Find the charge on the inner surface of the conductor.
b. Find the charge on the outer surface of the conductor.
c. Without touching the conductor, a charge of -14.0 nC is inserted into the cavity through a small hole in the conductor. Find the charge on the inner surface of the conductor in this case.
d. Find the charge on the outer surface of the conductor in this case.

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.