This is two or more elements chemically combined in a fixed ratio.

example: water, carbon dioxide, sodium chloride

What is the thinnest soap film (excluding the case of zero thickness) that appears black when illuminated with light with a wavelength of 480 ? the index of refraction of the film is 1.34, and there is air on both sides of the film. express your answer in nanometers. hint 1. how to approach th

Which planet do you think would be easiest for humans to colonize some day?

Aball horizontally thrown from a cliff at 8m/s