There are 2 point charges. q1 is 4nc and is at (-2,0). q2 is -2nc and is at (0,3).
how much work does the electric field do when a third point charge of +3.00 nc is moved from infinitely far away and placed at the origin?
i know infinitely far means va will be 0. however because there are 2 other charges instead of 1, i do not know how to manipulate k(q)/d to fit all the charges in.

The intensity, or loudness, of a sound can be measured in decibels (db), according to the equation , where i is the intensity of a given sound and is the threshold of hearing intensity. what is the intensity, in decibels, [i(db)], when ? use a calculator. round to the nearest whole number. 8 9 19 80

Agas contained within a piston-cylinder assembly undergoes three processes in series: process 12: compression with pv= constant from 1 bar and 1 liter to 4 bar. process 23: constant pressure expansion to 1 liter. process 31: constant volume calculate the pressure and volume at each state, and sketch the processes on a p-vdiagram labeled with pressure and volume values at each numbered stat

When the force acting on an object points at least partially in the direction of the motion the work done is considered to be negative