Suppose we have two infinitely long parallel wires separated by carrying identical currents, i. a third parallel wire of length /, mass m, and current i3 is being levitated above by the two infinitely long wires. (a) if we assume that the infinite wires have current flowing in the +z-direction (out of the page), which direction is the current in the third wire flowing? explain your reasoning. (b) provide an expression for the force of one of the infinitely long wires on the levi- tated wire. express your answer in terms of given variables (no numbers) and appropriate constants. assume that all wires are separated by the same distance a. (c) what must the current be in the infinite wires in order to accomplish the setup desc a distance of a and ed in part (b)? suppose a 2cm, 15m, m = 2g, and i3 =10a

the answer would be 32*f

increase masses, decrease separation

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.