| |
Ne- Ne
- Neon is a light gaseous inert element.
- Near Field
- Locations close to the sound source between the source and the far field. The near field is typically characterized by large sound pressure level variations with small changes in measurement position from the source.
- Nearsightedness
- Myopia. Images of distant objects are formed in front of the retina.
- Nebuchadnezzar
- The name of a wine bottle equivalent to the volume of 20 standard bottles or 15 litres.
- Nebula
- A cloud of dust and gas in space which is visible to observers on the Earth because it either emits, reflects or absorbs starlight.
- Necking
- Reduction of the cross-sectional area of a material in a localized area caused by uniaxial tension.
- Needle File
- Small files of various cross-sections that are used for detailed work.
- Needle Nose Pliers
- Pliers with half round and tapered jaws. Also known as Long Nose Pliers.
- Needle Roller Bearing
- A special bearing which has a small OD when compared to its ID.
- NEF
- There are a number of different noise criteria measurements used by local authorities to determine noise levels in the community.
- Negative
- A quantity or value that is less than zero.
- Negative Feedback
- Feedback from the output of an analogue circuit that tends to oppose the input.
- Negative Ground
- A system where the negative terminal of the source is connected to the system′s metal chassis.
- Negative Numbers
- Numbers that are less than zero are negative numbers.
- Negative Resistance
- A device having negative voltage-current characteristics.
- Negative Temperature Coefficient
- A term used to describe a component whose resistance or capacitance decreases when temperature increases.
- Neodymium
- One of the more reactive members of the lanthanide group.
- Neon
- Light gaseous inert element.
- Neon Bulb
- Glass envelope filled with neon gas which when ionized by an applied voltage will glow red.
- Neper
- A unit expressing the ratio of two numbers as a natural logarithm.
- Neptune
- The outermost gas giant in our solar system.
- Neptunium
- Produced artificially by nuclear reaction between uranium and neutrons.
- Net Indicated Mean Effective Pressure
- The ratio of net work per cycle to cylinder volume displaced per cycle.
- Network Polymer
- A polymer composed of trifunctional mer units that form three-dimensional molecules.
- Neutral Ammonium Fluoride
- Alternative name for Ammonium Fluoride.
- Neutral Density
- An optical coating that appears grey to the eye and has a flat absorption curve throughout the visible spectrum.
- Neutral Equilibrium
- A body is in neutral equilibrium if it stays in the displaced position after if has been displaced slightly.
- Neutral Flame
- A gas flame in which the oxygen and acetylene volumes are balanced and both gases are completely burned.
- Neutral Plane
- Plane through a beam where compression and tension stresses are zero.
- Neutral Solution
- An aqueous solution in which the concentrations of aqueous hydrogen ions and hydroxide ions are equal.
- Neutrino
- A neutral lepton; one exists for each of the charged leptons (electron, muon, and tau).
- Neutron
- A sub-atomic particle, within the nucleus of an atom, which has unit mass and zero charge.
- Neutron Star
- A star composed only of neutrons.
- New Car Assessment Program
- The U.S. government “crash testing” program.
- New General Catalogue
- A catalogue of non-stellar celestial objects that was compiled by JLE Dreyer of Armagh Observatory and published in 1888.
- Newton
- The SI unit of force.
- Newton, Isaac
- Newton was a mathematician and natural philosopher (physicist).
- Newton Metre
- The SI unit of Torque.
- Newtonian Fluid
- A fluid whose viscosity does not depend on gradients in flow speed.
- Newtons Alloy
- A low melting point alloy.
- Newton′s Law of Universal Gravitation
- Every particle in the Universe attracts every other with a force which is proportional to the product of their masses and inversely proportional to the square of their seperation.
- Newtons Laws of Motion
- Sir Isaac Newton published Philosophiae Naturalis Principia Mathematica in 1687 containing the three basic laws of motion.
| |
