You have four point charges 2q, q, -q, -2q. if possible describe how you would place a closed surface that encloses at least the charge 2q ( and perhaps other charges) and through which the net electric flux is a) 0 b) =3q/ɛ c)-2q/ɛ

CBSE Grade 12 Physics

This problem has been solved! see the answera non-uniform fire escape ladder is 6.0m long whenextended to the icy alley below. it is held at the top by africtionless pivot, and there is neglibible frictional force fromthe icy surface at the bottom. the ladder weighs 250n, and it'scenter of gravity is 2.0m along the ladder from the bottom. amother and child of total weight 750n are on the ladder 1.5m fromthe pivot. the ladder makes an angle θ with the horizontal.find the magnitude and direction ofa) the force exerted by the icy alley on the ladderb) the force exerted by the ladder on the pivotc) do your answers in part a and b depend on the angle?

Aforklift raises a 1,020 n crate 3.50 m up to a shelf. how much work is done by the forklift on the crate? the forklift does j of work on the crate.

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?