The electric field everywhere on the surface of a thin, spherical shell of radius 0.785 m is of magnitude 920 N/C and points radially toward the center of the sphere. (a) What is the net charge within the sphere's surface?
nC

(b) What is the distribution of the charge inside the spherical shell?

Gunpowder residue is most likely to show up where on a shooters hands

What will a positive and a negative charge do if they are separated from each other?

Boxing gloves are padded to lessen the force of a blow. (a) calculate the force exerted by a boxing glove on an opponent’s face, if the glove and face compress 7.50 cm during a blow in which the 7.00-kg arm and glove are brought to rest from an initial speed of 10.0 m/s. (b) calculate the force exerted by an identical blow in the gory old days when no gloves were used and the knuckles and face would compress only 2.00 cm. (c) discuss the magnitude of the force with glove on. does it seem high enough to cause damage even though it is lower than the force with no glove?