Dog Pup. These cute pups are part of the sled dog team at Denali -- the only national park in the U.S. with working dogs. Sled dogs have an essential role in the life and culture of Alaska, and Denaliâs team helps protect a national park and the wildlife, scenery and wilderness therein.
a branch of physics that studies the structure of the atomic nucleus, the processes of radioactive decay, and the mechanism of nuclear reactions. The meaning of the term is frequently expanded to include the physics of elementary particles as well. Sometimes areas of research that have become independent branches of technology, such as accelerator technology and nuclear power industry, continue to be considered as branches of nuclear physics.
nuclear. adj. 1. (General Physics) of, concerned with, or involving the nucleus of an atom: nuclear fission. 2. (Biology) biology of, relating to, or contained within the nucleus of a cell: a nuclear membrane. 3. of, relating to, forming, or resembling any other kind of nucleus. 4. (General Physics) of, concerned with, or operated by energy from fission or fusion of atomic nuclei: a nuclear weapon.