Three equal point charges, each with charge 1.65 μc , are placed at the vertices of an equilateral triangle whose sides are of length 0.650 m . what is the electric potential energy u of the system? (take as zero the potential energy of the three charges when they are infinitely far apart.)

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?

Which notation is used to represent an alpha particle? a. b. c. d.

A17,250 kg rocket is pushed with a thrust of 6,450,284 n. what is the acceleration of the rocket?