The text says that the local fluff, which surrounds the sun, has a temperature of 7500 k and a density 0.1 atom per cm3. the local fluff is embedded in hot gas with a temperature of 106 k and a density of about 0.01 atom per cm3. are they in equilibrium? (hint: in pressure equilibrium, the two regions must have nt equal, where n is the number of particles per unit volume and t is the temperature.) what is likely to happen to the local fluff?

its c i just checked it

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.

a sonic boom is a loud boom that breaks the sound barrier

explanation: