N Scientific & Educational Abbreviation

Normal

Conforming to a type, standard, or regular pattern. According with, constituting, or not deviating from a norm, rule, or principle

Neutrino

A fundamental particle produced by the nuclear reactions in stars. Neutrinos are very hard to detect because the vast majority of them pass completely through the Earth without interacting.

Nitrogen

Symbol:"N" Atomic Number:"7" Atomic Mass: 14.00amu. Nitrogen is found as a gas in nature and it is classified as a non-metal. It makes up over 75 percent of the air surrounding the Earth. It is also found in the soil and used by plants. You will also find nitrogen in ammonia, steel making, freezing liquids, and oil refineries. Element number 7, a colorless, odorless, tasteless gas that makes up about 80% of the earth's atmosphere.

November

Newton

The SI unit of force. It is equal to the force that would give a mass of one kilogram an acceleration of one metre per second per second, and is equivalent to 100,000 dynes.

North

Cardinal point of the compass The direction of that pole of Earth at which an observer would note that direction of Earth's rotation was towards his left hand

Refractive Index

(ASTM D 1218) number indicating the angle through which a ray of light is deflected as it passes through a solid or fluid medium; the number that expresses the ratio of the sine of the angle of incidence to the sine of the angle of refraction. Typically used for monitoring water-based fluids or solutions. The ratios of the velocities of light in a medium and in air under the same conditions. Measured by the ratio of the sines of the angles of incidence and refraction.

None

Nova

A star that flares up to several times its original brightness for some time before returning to its original state.