## Mass

The atomic mass of a chemical element (also known as the relative atomic mass or average atomic mass or atomic weight) is the average atomic mass of all the chemical element's isotopes as found in a particular environment, weighted by isotopic abundance. Periodic tables usually list these with reference to the local environment of Earth's crust and atmosphere. An uncertainty in parenthesis is often included. For artificial elements the nucleon count of the most stable isotope is listed in brackets as the atomic mass. ...more on Wikipedia about "Atomic mass"

Avery Weigh-Tronix is a company specializing in weighing scales. Its headquarters are in Smethwick, Birmingham, England, with a US-based manufacturing and retail manufacturing plant. It was formed in 2000 ...more on Wikipedia about "Avery Weigh-Tronix"

A Bainbridge mass spectrometer is a device used to determine isotopic masses. A beam of positive particles is produced from the isotope under study. The beam is subject to the combined action of perpendicular electric and magnetic fields. Since the forces due to these two fields are equal and opposite, the particles with a velocity equal to $v=E/B$ do not experience a resultant force. So, they pass freely through a slit, and are then subject to another magnetic field, transversing a semi-circular path and striking a photographic plate. The mass of the isotope is determined through subsequent calculation. ...more on Wikipedia about "Bainbridge mass spectrometer"

The body mass index (BMI) or Quetelet Index is a quotient of body mass which takes into account both height and weight: ...more on Wikipedia about "Body mass index"

Body weight is simply the weight of any animal, including humans. The term is usually encountered in connection with: ...more on Wikipedia about "Body weight"

Men's classifications according to WBC, WBA, IBF, and WBO: ...more on Wikipedia about "Boxing weight classes"

Brain to body mass ratio (also known as the Encephalization Quotient - EQ) is a rough estimate of the possible intelligence of an organism. ...more on Wikipedia about "Brain to body mass ratio"

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The center of mass of an object is a point at which the object's mass can be assumed, for many purposes, to be concentrated. ...more on Wikipedia about "Center of mass"

The law of conservation of mass/matter (The Lomonosov- Lavoisier law) states that the mass of a system of substances is constant, regardless of the processes acting inside the system. An equivalent statement is that matter changes form, but cannot be created or destroyed. This implies that for any chemical process in a closed system, the mass of the reactants must equal the mass of the products. ...more on Wikipedia about "Conservation of mass"

Supercritical redirects here; for supercritical fluid, see Supercritical fluid. ...more on Wikipedia about "Critical mass"

Curb weight or kerb weight is the total weight (i.e., mass) of an automobile with standard equipment, oil, lubricants, coolant, a full tank of fuel and not loaded with either passengers or cargo. ...more on Wikipedia about "Curb weight"

In solid state physics, a particle's effective mass is the mass it seems to carry in the semiclassical model of transport in a crystal. It can be shown that, under most conditions, electrons and holes in a crystal respond to electric and magnetic fields almost as if they were free particles in a vacuum, but with a different mass. This mass is usually stated in units of the ordinary mass of an electron me (9.11×10-31 kg). ...more on Wikipedia about "Effective mass"

Gram atomic mass is the mass, in grams, of one mole of atoms in a monatomic element. It is numerically equal to the atomic mass in amu. ...more on Wikipedia about "Gram atomic mass"

Gross weight is the total weight of a vehicle when fully loaded with passengers and/or cargo. It usually refers to the fully loaded weight of trucks, automobiles, or train cars like boxcars or tank cars. ...more on Wikipedia about "Gross weight" Please visit again http://www.shortopedia.com Mass

Weight in measuring human body weight in the medical sciences and in sports is a measurement of mass, expressed in units of mass such as kilograms (kg) or pounds (lb). In Britain, the stone (14 lb = 6.35 kg) is still common for this purpose as well. ...more on Wikipedia about "Human weight"

Inertial mass is a measure of the resistance of an entity to a change in its velocity relative to an inertial frame. The inertial frame does not have to be that of the mass in question; either before or after the measurement.
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In particle physics, the mathematical combination of a particle's energy and its momentum to give a value for the mass of the particle at rest. The invariant mass is the same for all frames of reference (see Special Relativity). ...more on Wikipedia about "Invariant mass"

It was later pointed out by other astrophysicists that in fact, the original analysis used by Jeans was flawed, for the following reason. In his formal analysis, Jeans assumed that the collapsing region of the cloud was surrounded by an infinite, static medium. In fact, because all scales greater than the Jeans length are also unstable to collapse, any initially static medium surrounding a collapsing region will in fact also be collapsing. As a result, the growth rate of the gravitational instability relative to the density of the collapsing background is slower than that predicted by Jeans' original analysis. This flaw has come to be known as the "Jeans swindle". Later analysis by Hunter corrects for this effect. ...more on Wikipedia about "Jeans mass"

This is a list of chemical elements, sorted by atomic mass (or most stable isotope) and color coded according to type of element. Each element's atomic number, name, element symbol, and group and period numbers on the periodic table are given. The number in parenthesis gives the uncertainty in the "concise notation" defined in the IUPAC reference "whereby standard uncertainty is given in parenthesis next to the least significant digits to which it applies", e.g., 1.00794(7) stands for 1.00794 ± 0.00007. For artificial elements the nucleon count of the most stable isotope is listed brackets [] as the atomic mass. ...more on Wikipedia about "List of elements by atomic mass"

Mass is a property of a physical object that quantifies the amount of matter it contains. Unlike weight, the mass of something stays the same regardless of location. It is a central concept of classical mechanics and related subjects. ...more on Wikipedia about "Mass"

A mass airflow sensor (MAF) determines the mass of air flowing through a conduit. This is generally achieved by using heated wires in the airstream. By knowing the temperature of the air (generally through an intake air temperature sensor) and the resistance in the wire, the MAF can determine how much mass is flowing. ...more on Wikipedia about "Mass airflow sensor"

A mass balance (also called a material balance) is an accounting of material entering and leaving a system. Fundamental to the balance is the conservation of mass principle, i.e. that matter can not disappear or be created. Mass balances are used e.g. to design chemical reactors, analyse alternative processes to produce chemicals, in pollution dispersion models etc. In environmental monitoring the term budget calculations is used to describe mass balance equations where they are used to evaluate the monitoring data (comparing input and output, etc.) ...more on Wikipedia about "Mass balance"

A mass flow meter, also known as inertial flow meter and coriolis flow meter, is a device that measures how much liquid is flowing through a tube. It does not measure the volume of the liquid passing through the tube, it measures the amount of mass flowing through the device. ...more on Wikipedia about "Mass flow meter"

In aerospace engineering, the mass fraction is an important measure of a rocket's efficiency. For a given target orbit, a rocket's mass fraction is the portion of the rocket's pre-launch mass (fully fueled) that does not reach orbit. In the cases of a single stage to orbit vehicle the mass fraction is simply the fuel mass divided by the mass of the full spaceship, but with a rocket employing staging, which is the vast majority of them, the mass fraction is higher because parts of the rocket itself are dropped off en route. Mass fractions are typically around 0.8 to 0.9, with lower numbers being better. ...more on Wikipedia about "Mass fraction"

The term mass in special relativity can be used in different ways, occasionally leading to confusion. Historically, mass can refer to either the invariant mass or the relativistic mass. ...more on Wikipedia about "Mass in special relativity"