Mustang sally just finished restoring her 1965 ford mustang car. to save money, she did not get a new battery. when she tries to start the car, she discovers that the battery is dead (an insufficient or zero voltage difference across the battery terminals) and so she will need a jump start. here is how she accomplishes the jump start: she connects a red jumper cable (wire) from the positive terminal of the dead battery to the positive terminal of a fully functional new battery. she connects one end of a black jumper cable to the negative terminal of the new battery. she then connects the other end of the black jumper cable to the negative terminal of the dead battery. the new battery (now in a parallel with the dead battery) is now part of the circuit and the car can be jump started. the car starter motor is effectively drawing current from the new battery. after the car with the dead battery is running, the cables can be disconnected in the reverse order that they were connected. while unhooking the jumper cables, the positive and negative cables almost touch and a spark jumps between the ends of the cables. this spark is caused by the movement of electrons through the air between the battery terminals. in what direction are the electrons traveling during the spark? view available hint(s)

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.

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.

third one with arrows on top of each other going the same direction