Suppose the charge on the inner conducting sphere is +3 µC, while +4 µC of charge is deposited on the conducting shell. (a)Find the surface charge (in µC) on the inner surface of the shell.
(b)Find the surface charge (in µC) on the outer surface of the shell

im guessing the west of station b

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.

find the sum of the two horizontal vectors and the sum of the two vertical vectors

isoceles right angled triangle