Consider an air solar collector that is 1 m wide and 5 m long and has a constant spacingof 3 cm between the glass cover and the collector plate. air enters the collector at 30°c ata rate of 0.15 m3/s through the 1-m-wide edge and flows along the 5-m-long passage way. if the average temperatures of the glass cover and the collector plate are 20°c and 60°c, respectively, determine (a) the net rate of heat transfer to the air in the collector and (b)the temperature rise of air as it flows through the collector.

the current is 0.6

voltage ÷ resistance = current

so 12 ÷ 20 = 0.6

the closer the planet is to the sun, the larger the gravity

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.