O ar-condicionado reduz a umidade do ar e causa ressecamento das narinas. Como isso aumenta as chances de entrar em contato com micro-organismos causadores de doenças?

What’s a special glass that most beakers are made of

Water's surface tension and heat storage capacity are accounted for by its a) orbitals b) weight c) hydrogen bonds d) mass e) size

Why does earth rotate? because earth is formed from cold gases collapsing due to gravity because the matter in the nebula that formed earth was spinning because earth forms more than 99% of the mass of the solar system because the hydrogen atoms inside the nebula fused to form helium