A metallic sphere of radius 5 cm is charged such that the potential surface is 100V (relative to infinity).Which of the following plots correctly shows the potential as a function of distance from the center of the sphere? a) plot W
b) plot X
c) plot Y
d) plot Z

The material that keeps its new shape after it is stretched is called?

Does heating a metal wire increase or decrease its electrical resistance? why?

Two cannon balls weighing 18 kg and 24 kg are chained together and fired horizontally with a velocity of 165 m/s from the top of a 21-m wall. the chain breaks during the flight of the cannonballs and the 18-kg cannonball strikes the ground at t = 1.5 s, at a distance of 240 m from the foot of the wall, and 7 m to the right of the line of fire. determine the position of the other cannonball at that instant. neglect the resistance of the air.