Amarble slides along a frictionless track at a constant speed before encountering a section of the track that is covered with a thin layer of putty. the instantaneous velocity of the marble as it slides past the putty, as a function of time is given by =−+ where =0 at the moment when the marble first comes into contact with the putty. as the marble exits the region covered in putty, the marble's instantaneous acceleration goes to zero. for =2.50 m/s, =2.95m/s2, and c=7.30m/s4, calculate the length δx of the track that is covered with putty.

he made 11 calls in one day

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.

part 1: which substance has a higher solubility?

a

smallest amount left undissolved atall temps in table shown most has dissolved high sol'by

a cold ice-tea.

pour in room temperature or cold water. cover the pitcher and refrigerate. steep white or green tea for 6 to 8 hours; steep black or oolong tea for 8 to 12 hours.jun 28, 2015