g If you have a light in your house on a dimmer switch you should try this yourself. In the space below write a paragraph about how the light from an incandescent source changes as the temperature decreases. Notice changes in both how bright the light is and what colors/wavelengths of light you can see. If you have such a light at your house you can also describe how the color and intensity of the light changes when you are just looking with your eyes and not through the spectrometer.

they start with the same

a.) travels faster in solids because the particles are closer together.

air is a gas water is a liquid

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.