* Fermi ( unit ), unit of length in particle physics equivalent to the femtometre

The femtometre ( American spelling femtometer, symbol fm ) ( Danish:, " fifteen "; Ancient Greek:,, " unit of measurement ") is an SI unit of length equal to 10 < sup >- 15 </ sup > metres.

* fm, the symbol for femtometre, a unit of length also called a fermi

Because mesons are composed of sub-particles, they have a physical size, with a radius roughly one femtometre, which is about the size of a proton or neutron.

The femtometre was adopted by the 11th Conférence Générale des Poids et Mesures, and added to SI in 1964.

The femtometre, used mainly in particle physics, is usually called a fermi.

* fermi ( fm ) (= 1 femtometre in SI units )

a litre is 10 < sup >- 3 </ sup > cubic metres, so 10 < sup >- 18 </ sup > cubic metres is < sup >- 15 </ sup > litres, or one femtometre.

In order to fuse, the nuclei must be within 1 femtometre ( 1 × 10 < sup >− 15 </ sup > metres ) of each other, which is achievable using very high temperatures.

This unit, affectionately dubbed `` The Monster '', can be wheeled to any convenient location and provides a wealth of information about the patient's breathing.

But it is often more practical in numerical computation to perform the scaling all at once as above ( and a unit scaling can be convenient in other ways ).

In general, the masses of all hadrons are of the order of 1 GeV / c < sup > 2 </ sup >, which makes the GeV ( gigaelectronvolt ) a very convenient unit of mass for particle physics:

In certain fields, such as plasma physics, it is convenient to use the electronvolt as a unit of temperature.

* The atomic mass unit ( u ) is defined so that a single carbon-12 atom has a mass of 12 u ; 1 u is approximately .< ref group =" note "> Since the Avogadro constant N < sub > A </ sub > is defined as the number of atoms in 12 g of carbon-12, it follows that 1 u is exactly 1 /( 10 < sup > 3 </ sup > N < sub > A </ sub >) kg .</ ref > The atomic mass unit is convenient for expressing the masses of atoms and molecules.

" The meme as a unit provides a convenient means of discussing " a piece of thought copied from person to person ", regardless of whether that thought contains others inside it, or forms part of a larger meme.

The " Dobson unit ", a convenient measure of the columnar density of ozone overhead, is named in his honor.

Therefore, the mole is a convenient unit for that physical quantity.

This allows for a relatively small unit to be located near the charge to be measured while the much larger reed-driver and amplifier unit can be located wherever it is convenient for the operator.

For wavelengths near the visible spectrum, it is often more convenient to use the nanometer in place of the meter as the unit of measure.

In all units, it is convenient to employ two types of magnetic field, B and H, as well as the magnetization M, defined as the magnetic moment per unit volume.

In some games of chance, using odds against is also the most convenient way to understand what winnings will be paid if the selection is successful: the winner will be paid ' six ' of whatever stake unit was bet for each ' one ' of the stake unit wagered.

A more convenient unit is the GPU, or geopotential unit: it equals 10 m < sup > 2 </ sup >· s < sup >− 2 </ sup >.

The light-second is a convenient unit for measuring distances in the inner Solar System, because it corresponds very closely to the radiometric data used to determine them ( the match is not exact for an Earth-based observer because of a very small correction for the effects of relativity ).

* Millidarcy ( mD ), one thousandth of a darcy, a unit of fluid permeability that is sometimes more convenient than the darcy

It will be a compact and convenient local government unit.

Despite millibars not being an SI unit, meteorologists and weather reporters worldwide have long measured air pressure in millibars as the values are convenient.

It is convenient to introduce the unit vector orthogonal to as well, namely.

The game consists of a battery-powered center unit ( the Dark Tower ), a circular cardboard game board divided into four interlocking quarters ( with a hole in the middle for the Tower ), four cardboard tokens, several plastic flags, playing pieces, and locations which are placed in convenient holes in the board.

A possibility is using 0. 300 Gm / s, convenient to write, but somewhat impractical in understanding ( writing something large as a fraction of something even larger ; in a context of larger numbers expressed in the same unit this could be convenient, but that is not applicable here ).

When the length of vectors is defined, it is possible to also define a dot product — a scalar-valued product of two vectors — which gives a convenient algebraic characterization of both length ( the square root of the dot product of a vector by itself ) and angle ( a function of the dot product between any two vectors ).

It is an ideal gene to use due to its convenient size ( 2 – 3 kb in length with a ~ 1000 nucleotide coding sequence ) and low copy number.

* Extension ladder or " telescopic ladder ", a fixed ladder divided into two or more lengths for more convenient storage ; the lengths can be slid together for storage or slid apart to expand the length of the ladder ; a pulley system may be fitted so that the ladder can be easily extended by an operator on the ground then locked in place using the dogs and pawls

The sling psychrometer, where the thermometers are attached to a handle or length of rope and spun around in the air for a few minutes, is sometimes used for field measurements, but is being replaced by more convenient electronic sensors.

NCL has been proven to be a convenient method for the chemical synthesis of proteins well over 100 amino acids in length, as demonstrated on the 166-amino-acid polypeptide chain of the synthetic variant of the erythropoiesis protein and the 203 amino acid HIV-1 protease.

Since one period of the function contains all of the unique information, it is sometimes convenient to say that the DTFT is a transform to a " finite " frequency-domain ( the length of one period ), rather than to the entire real line.

Train and Thruway Motorcoach tickets are purchased together from Amtrak for the length of a passenger's journey, and the connections are timed for convenient dedicated and guaranteed-reliable transfers between the two services.

This is simply a short length of a thin log, still with the bark on it, with one end reduced with a drawknife to convenient diameter for a handle.

It was convenient for StrataCom to make the length of one cell equal to the length of one T1 frame

In addition to these three halls are four compartments of 25 feet wide, running the whole length of the building ; two are placed between the Centre Hall and the side halls, and two on each side of the latter ; divided into sections of 25 feet square, forming convenient divisions for the purposes of classification.

Honesty bars are convenient, since a guest can make or serve a drink at any time, keeping a tab for himself or herself for the length of the stay.

Zoom lenses ( sometimes referred to as " true " zoom ) are ideally parfocal in that focus is maintained as the lens is zoomed ( focal length and magnification changed ), which not only is convenient, but also has the advantage of allowing more accurate focusing at maximum focal length and then zooming back to a shorter focal length to compose the image.