decay level
91Diabetes management — Main article: Diabetes mellitus Diabetes is a chronic disease with no cure as of 2010[update] but a lot of research is underway. It is associated with an impaired glucose cycle, altering metabolism. Management of this disease may include… …
92Environmental radioactivity — is produced by radioactive materials in the human environment. While some radioisotopes, such as strontium 90 (90Sr) and technetium 99 (99Tc), are only found on Earth as a result of human activity, and some, like potassium 40 (40K), are only… …
93Electron — For other uses, see Electron (disambiguation). Electron Experiments with a Crookes tube first demonstrated the particle nature of electrons. In this illustration, the profile of the cross shaped target is projected against the tube face at right… …
94Muon — The Moon s cosmic ray shadow, as seen in secondary muons generated by cosmic rays in the atmosphere, and detected 700 meters below ground, at the Soudan II detector Composition Elementary particle Statistics …
95Radiometric dating — (often called radioactive dating) is a technique used to date materials such as rocks, usually based on a comparison between the observed abundance of a naturally occurring radioactive isotope and its decay products, using known decay rates.[1]… …
96Half-Life (video game) — Infobox VG title=Half Life caption=The box art for Half Life shows the title on a rusted orange background, below the Greek lambda letter. developer=Valve Software publisher=Sierra Studios Electronic Arts Valve Software designer= engine=GoldSrc… …
97ADSR envelope — mdash; over time. The envelope may be a discrete circuit or module (in the case of analog devices), or implemented as part of the unit s software (in the case of digital devices).When a mechanical musical instrument produces sound, the Loudness… …
98Sound synthesis — Basics of sound When any mechanical collision occurs, such as a fork being dropped, sound is produced. The energy from the collision is transferred through the air and other mediums, and if heard, into your ears. On a small scale, the collision… …
99Creation-evolution controversy — The creation evolution controversy (also termed the creation vs. evolution debate or the origins debate) is a recurring political dispute about the origins of the Earth, humanity, life, and the universe, [See harvnb|Hovind|2006, for example.]… …
100Ecosystem ecology — Figure 1. A riparian forest in the White Mountains, New Hampshire (USA). Ecosystem ecology is the integrated study of biotic and abiotic components of ecosystems and their interactions within an ecosystem framework. This science examines how… …
