PLEASE HELP ME BECAUSE I DON'T HAVE LONG TIME TO REVIEW: how to determine the magnetic induction vector caused by a current element at a point ???

okay i have so many questions. but the big one here is: um wt..f is this mess? ?

your answer is, orbit around the nucleus

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards