Monday homework problem 11.9 the circular solenoid drawn to the right has a radius r. a square loop of wire with 1 turn and normal parallel to the axis of the solenoid is inside the solenoid. the length of one side of the square loop is ℓ. the solenoid is wound with n turns of over a length d. the current through the solenoid is i(t) = γt2 where γ is a constant. the system is drawn to the right. the magnetic field in the solenoid points out of the page as drawn. calculate the emf around the square loop (dark square) as a function of time.

i would like to make dinner for my mom, dad, and sister

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.

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.

inverse v=i*r

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