Aperson will feel a shock when a current of greater than approximately 100 μa flows between his index finger and thumb. if the resistance of dry skin is 200 times larger than the resistance of wet skin, how do the maximum voltages without shock compare in each scenario? a the voltage on dry skin needs to be 200 times smaller than the voltage on wet skin. b the voltage on dry skin needs to be 200 times larger than the voltage on wet skin. c the voltage on dry skin is the same as the voltage on wet skin. d the voltage on dry skin needs to be 40,000 times larger than the voltage on wet skin.

answer: good job it's all correct !

explanation:

the total distance traveled by the car is

30km + 49km = 79 km .

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.