The starship Cosmographer receives a distress signal. Zorp, the communication officer, announces it is coming from an ally’s damaged ship four light-years away. How might Zorp know the distance to the source of the signal? Should the crew just drop everything and rush to the aid of the ship in distress? Why or why not? What would have to be different from our current understanding of science for the Cosmographer to get to the damaged ship on time to save its crew?

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.

friction

explanation:

they us to move forward and backwards

moisture is lackin, and organic acids are scarce.