Ben wants to model how the motion of particles changes with temperature. he considers water in an iron pot. ben draws a model to show how the water particles and iron particles move at room temperature. then, he draws a second model to show how the water particles and iron particles move as the pot of water is heated. how should ben’s second model differ from the first?

absorption lines are where light has been absorbed by the atom thus you see a dip in the spectrum whereas.

emission spectra have spikes in the spectra due to atoms releasing photons at those wavelengths.

explanation:

the old price per ounce is c/4.

the new price per ounce is c/3.6.

the ratio of the old price to the new one is

(c/4)/(c/3.6) = (c/c)×(3.6/4) = 0.9 . . = 9/10 . . "nine tenths" in either form

3. dark matter

empty space could also be a simple vacuum