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air mass

(Encyclopedia) air mass, large body of air within the earth's atmosphere in which temperature and humidity, although varying at different heights, remain similar throughout the body at any one height…

Timeline of Worldwide School and Mass Shootings

Gun-related tragedies in the U.S. and around the world The following table lists notable worldwide mass and school shootings from 1996 to the present. What distinguishes mass shootings from other…

June 2016: Orlando: Deadly Mass Shooting

World News | Disasters & Science News Here's a slideshow depicting the major U.S. news events of June 2016. 1. Shooting on UCLA Campus 2. Paul Ryan Endorses Trump 3. Stanford…

Federal Obesity Guidelines: Measuring Body Mass

The new body mass index (BMI) applies to both men and women. To determine BMI, weight in kilograms is divided by height in meters, squared. To calculate your body mass index from the table below,…

Mass, in Christianity

(Encyclopedia) Mass, religious service of the Roman Catholic Church, which has as its central act the performance of the sacrament of the Eucharist. It is based on the ancient Latin liturgy of the…

mass, in physics

(Encyclopedia) mass, in physics, the quantity of matter in a body regardless of its volume or of any forces acting on it. The term should not be confused with weight, which is the measure of the…

mass-luminosity relation

(Encyclopedia) mass-luminosity relation, in astronomy, law stating that the luminosity of a star is proportional to some power of the mass of the star. More massive stars are in general more luminous…

atomic mass unit

(Encyclopedia) atomic mass unit or amu, in chemistry and physics, unit defined as exactly 1&fslsh;12 the mass of an atom of carbon-12, the isotope of carbon with six protons and six neutrons in…

center of mass

(Encyclopedia) center of mass, the point at which all the mass of a body may be considered to be concentrated in analyzing its motion. The center of mass of a sphere of uniform density coincides with…