An ideal or imaginary body that is absolutely black when cold, but is a perfect absorber of radiation and at the same time a perfect radiator. Black body temperatures are used to ...
The amount of matter in a body, which should not be confused with weight. The same object will have different weights in space and earth but the mass remains constant.
The emission of electromagnetic radiation as the result of exposure to some other radiation, which emission ceases when the stimulus that produces it ceases to act on the emitting ...
A gas used by all green plants and recycled by them to form wood and the oxygen we breathe. In very large quantities it can be poisonous to animal life.
Ćelije su osnovne funkcionalne jedinice života (svi živi organizmi su sačinjeni od ćelija). Otkrio ih je Robert Huk 1665. god. Reč ćelija potiče od ...
5 词条
