Some force is produced which acts against gravitation and balances it when the bird maintains its level in the air, or more than balances it when the bird rises in the air. The necessary force is produced by burning the sugar in its muscles; in...
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Some force is produced which acts against gravitation and balances it when the bird maintains its level in the air, or more than balances it when the bird rises in the air. The necessary force is produced by burning the sugar in its muscles; in...
There is general belief that night air is dangerous for us to breathe but this is absolutely wrong. As a matter of fact, night air is purer than day air because it contains less carbon dioxide with fewer fires and furnaces and less traffic.
The air is constantly being used. All living creatures breathe in the oxygen. The nitrogen of the air is being used by certain microbes and also by men with the help of electricity. The green plants use the Carbonic acid of the air, upon which...
The hotter the air is, the more water vapour it can hold. If the air is made very hot by the sun in the daytime, and if there is such water near, with little wind, then the air, as the day goes on, comes to...
The air does stop a great deal of the light of the Sun. The air is a blanket, and prevents the passage of light and heat to a great extent, whether from outside space to the Earth or from the Earth to outside space. If...
Certainly, the air goes round with the Earth, as the seas do, and everything that is swimming in it.