A charge of -2.85 C is fixed at the center of a compass. Two additional charges are fixed on the circle of the compass, which has a radius of 0.108 m. The charges on the circle are -4.3 pc at the position due north and +5.40 pc at the position
due east. What are the magnitude and direction of the net electrostatic force acting on the charge at the center? Specify the
direction relative to due east.

the answer to your question is high voltage and high currency

ammonium chloride & tallow

russian is not my first language, so i'm afraid i can't write out an answer in russian, but hopefully you can find a way to do so. here's my best translation of the problem: you're given a plot of a particle's position in one-dimensional space over time, and you're asked to find either the total distance traveled by the particle after 6 seconds had elapsed, or the total displacement of the particle after 6 seconds.

if you want the total distance traveled, you would first need to determine the particle's velocity as a function of time, then integrate that over the 6-second interval. we know the position function is quadratic with roots at 0 and 6, so we have

where is unknown. because the position is parabolic, there is symmetry about the midpoint at , and we know that

so that the position function is

which means the velocity is

then the total distance traveled is

so the total distance traveled is 20 m.

on the other hand, if you want to find displacement: the particle starts at and ends at , so its displacement is 0.

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.