tears. pl n. 1. (Physiology) the clear salty solution secreted by the lacrimal glands that lubricates and cleanses the surface of the eyeball and inner surface of the eyelids. 2. a state of intense frustration (esp in the phrase bored to tears). 3. in tears weeping.
Nuclear power is energy which is produced with the use of a controlled nuclear reaction. Many nations use nuclear power plants to generate electricity for both civilian and military use, and some nations also utilize this type of energy to run parts of their naval fleets, especially submarines.
Nuclear power is an alternative energy source that can be obtained from either the splitting of the nuclei of atoms (nuclear fission) or the combining of the nuclei of atoms (nuclear fusion). In either of these two reactions, great amounts of energy are released.olar energy can be used to heat buildings and water and to produce electricity. However, the Sun does not always shine, and the process of collecting solar energy and storing it for use at night and on cloudy days is difficult and expensive. Solar energy systems can be either passive or active.