spontaneous nuclear reaction
71radioactive decay — noun the spontaneous disintegration of a radioactive substance along with the emission of ionizing radiation • Syn: ↑decay, ↑disintegration • Derivationally related forms: ↑disintegrate (for: ↑disintegration), ↑decay ( …
72Boric acid — Boric acid …
73Ernest Rutherford — Infobox Scientist name = Ernest Rutherford birth date = birth date|df=yes|1871|8|30 birth place = Brightwater, New Zealand death date = death date and age|df=yes|1937|10|19|1871|8|30 death place = Cambridge, England nationality = New Zealand… …
74Haymarket affair — Haymarket bombing redirects here. For the 2007 car bombs in London, see 2007 London car bombs. Haymarket Martyrs Monument U.S. National Register of Historic Places …
75Neutron moisture gauge — A neutron moisture meter is a moisture meter utilizing neutron scattering. The meters are most frequently used to measure the water content in soil or rock. The technique is non destructive, and is sensitive to moisture in the bulk of the target… …
76Radiation — Radiation, as in physics, is energy in the form of waves or moving subatomic particles emitted by an atom or other body as it changes from a higher energy state to a lower energy state. Radiation can be classified as ionizing or non ionizing… …
77Photodisintegration — is a physical process in which extremely high energy gamma rays interact with an atomic nucleus and cause it to enter an excited state, which immediately decays into two or more daughter nuclei. A simple example is when a single proton or neutron …
78Heat — In physics, heat, symbolized by Q , is energy transferred from one body or system to another due to a difference in temperature. [cite book|author= Daintith, John |title=Oxford Dictionary of Physics|publisher=Oxford University… …
79Great Chicago Fire — Artist s rendering of the fire, by John R. Chapin, originally printed in Harper s Weekly; the view faces northeast across the Randolph Street Bridge. The Great Chicago Fire was a conflagration that burned from Sunday, October 8, to early Tuesday …
80Critical Mass — This article is about bicycle events. For the nuclear reaction, see Critical mass. For other uses of the term critical mass , see Critical mass (disambiguation). San Francisco Critical Mass, April 29, 2005. Critical Mass is a cycling event… …
