Plastics combine such properties as built-in color, light weight, optional transparency or translucency, resistance to corrosion, as well as the ease of fabrication.

When he was inducted into the Army at Fort Knox, Ky., Hansen's weight had dropped to 180 -- `` too light for me to be at my best '' he said.

Its light weight and compact flat design make it easy to retrieve and relatively easy to store ; some anchor rollers and hawsepipes can accommodate a fluke-style anchor.

Specialist aerobatic aircraft have powerful piston engines, light weight and big control surfaces, making them capable of very high roll rates and accelerations.

In the 1980s aluminum alloy frames and other components became popular due to their light weight, and most mid-range bikes are now principally aluminum alloy of some kind.

The material is valued by watchmakers for its light weight, scratch resistance, durability and smooth touch.

Another is the smoothbore 12 pounder Napoleon, which was renowned for its sturdiness, reliability, firepower, flexibility, relatively light weight, and range of.

The Small Deep Space Transponder ( SDST ) is a compact and light weight radio communications system.

Hoplite equipment ranged from light to heavy – the total weight of a set of heavy bronze breastplate armour was around.

It is light in weight, and does not compact over time.

Cases vary greatly in weight and sturdiness: Italian harpsichords are often of light construction ; heavier construction is found in the later Flemish instruments and those derived from them ( see History of the harpsichord ).

In 1928 Imi won the Slovakian Youth Wrestling Championship, and in 1929 the adult championship ( in the light and middle weight division ).

Because of its relative nuclear instability, lithium is less common in the solar system than 25 of the first 32 chemical elements even though the nuclei are very light in atomic weight.

In early lighthouses, the light source was a kerosene lamp or, earlier, an animal or vegetable oil Argand lamp, and the lenses rotated by a weight driven clockwork assembly wound by lighthouse keepers, sometimes as often as every two hours.

The ship's shallow draft allowed navigation in waters only one metre deep and permitted beach landings, while its light weight enabled it to be carried over portages.

The rotary models quickly became popular for their combination of good power and light weight when compared to piston-engined competitors that required heavier V6 or V8 engines to produce the same power.

While most machine pistols are designed to be fired with one hand, their light weight, small size, and extremely rapid rates of fire make them difficult to control.

The MX-5 was conceived as a small roadster – with light weight and minimal mechanical complexity limited only by legal and safety requirements ; technologically modern, but a philosophically direct descendant of small British and Italian roadsters of the 1960s such as the Triumph Spitfire, MG MGB, Fiat 124 Sport Spider, Alfa Romeo Spider and Lotus Elan.

Open-wheel vehicles, due to their light weight, aerodynamic capabilities, and powerful engines, are often considered the fastest racing vehicles available and among the most challenging to master.

The proportion of light hydrocarbons in the petroleum mixture varies greatly among different oil fields, ranging from as much as 97 per cent by weight in the lighter oils to as little as 50 per cent in the heavier oils and bitumens.

Though early electrical pickup tonearms were light, their full weight rested on the record.

However, unlike the Macintosh Portable which was essentially a battery powered desktop in weight and size, the light colors and decorative recessed lines did not seem appropriate for the scaled down designs.

Generally, the difference between an automatic rifle and a machine gun comes down to weight and feed system ; rifles, with their relatively light components ( which overheat quickly ) and small magazines, are incapable of sustained automatic fire in the way that machine guns are.

In many small boats, weight too far aft can cause drag by submerging the transom, especially in light to moderate winds.

Submachine guns are highly effective in close quarters ; their lower-powered pistol cartridges make them generally more controllable in fully automatic fire compared to assault rifles, while their small size and light weight grant maneuverability.

Modern day sleighs combine light metals, steel runners, and an aerodynamic composite body.

A non-rigid airship that uses heated air instead of a light gas ( such as helium ) as a lifting medium is called a hot-air airship ( sometimes there are battens near the bow, which assist with higher forces there from a mooring attachment or from the greater aerodynamic pressures there ).

With its extremely low center of gravity, aerodynamic layout and light weight ( for trikes ), tadpoles are considered the highest performance trikes.

Buckminster Fuller's Dymaxion concept of obtaining optimal efficiency by aerodynamic design and employing the most advantageous materials, although obvious, may have especially influenced such designs as the Aptera hybrid car prototype, which, like the Dymaxion, is a three-wheeled, ultra light, aerodynamic, fuel-efficient vehicle design.

The company produced light front-wheel drive and mid-engined sports cars with very aerodynamic fiberglass bodies mainly powered by enhanced Renault engines.

Visual changes included new wheels, a slightly different nose shape, a new raised bootlid with a larger integrated spoiler incorporating the third high level brake light ( in the rear window on the original Vanquish ), a Vanquish S badge on the bootlid ( the original Vanquish had no rear model designation ) and the addition of a small front splitter ( although this was mainly done for aerodynamic reasons ).

This option package consisted of unique blue-tinted glass fog light lenses, " Limited Edition " badging, carbon fiber instrument cluster, two-tone cloth / leather interior, and a raised spoiler resembling the original GT / GTP / SE spoiler set atop three aerodynamic pillars.

Its shape should be inspired by its location, from the magnificent but elusive landscape with its light and open spaces, to the harbor ’ s more tangible technical constructions ; the bridges gracefully suspended across the water, the transparent framework of the harbor cranes, the strength, softness and elegance of the ships ’ hulls, the wings of seagulls and the flawless aerodynamic shape of sails ”.

) As well as the change of light making visibility poor, a car can lose 20 – 30 % of its downforce due to the unique aerodynamic properties of the tunnel.

Exterior modifications include changing the aerodynamic characteristics of the vehicle via side skirts, front and rear bumpers, spoilers, splitters, air vents and light weight wheels.

The Zonda F, named after Formula One driver Juan Manuel Fangio, comes with an extra head light and different fog lights at the sides, new bodywork ( revised front end, new rear spoiler, more aerodynamic vents all around ) that improves the cars aerodynamics and different side mirrors.

Because of their light weight and aerodynamic structure they can be thrown high with less exertion than would be required when juggling balls or clubs.

Many people prefer to pick a vehicle that is light and aerodynamic in order to maximize distance traveled per battery charge.

As a result they absorb much less liquid than pads-making them ideal for light discharge and everyday cleanliness.

As the child addresses the shepherd in a dream, light -- in the form of the major mode -- begins to appear, and at the moment of the miracle we hear a clear and shining D major.

The " D -" and " L -" prefixes should not be confused with " d -" or " l -", which indicate the direction that the sugar rotates plane polarized light.

Australia defeated Sri Lanka in the final by 53 runs ( D / L ), in farcical light conditions, extending their undefeated run in the World Cup to 29 matches and winning three straight World Cups.

), the UV light of these regions was too weak to penetrate the highly pigmented skin of the initially ( relatively ) dark-skinned migrants so as to provide enough vitamin D for healthy bone development.

Hence, those with less pigmented skin survived and had children at higher rates because their skin allowed more UV light for the production of vitamin D. Thus, the skin of those in the group that left the African continent and went far north gradually developed adaptations for relatively greater translucence compared to equatorial hues.

This enabled the passage of more UV light into the body at high latitudes, facilitating the natural human body-process of manufacturing vitamin D ( which is essential for bone development ) in response to said light.

When exposed to ultraviolet light, natural ergosterols in mushrooms produce vitamin D < sub > 2 </ sub >, a process now exploited for the functional food retail market.

Recent research has found that the oyster mushroom naturally contains the cholesterol-lowering drug lovastatin, mushrooms produce large amounts of vitamin D when exposed to UV light, and that certain fungi may be a future source of taxol.

Assume the Earth is in L, at the second quadrature with Jupiter ( i. e. ALB is 90 °), and Io emerges from D. After several orbits of Io, at 42. 5 hours per orbit, the Earth is in K. Rømer reasoned that if light is not propagated instantaneously, the additional time it takes to reach K, that he reckoned about 3½ minutes, would explain the observed delay.

Bohren, D. Huffman, Absorption and scattering of light by small particles, John Wiley, New York 1983.

It also causes sunburn, and has other medical effects such as the production of vitamin D. Ultraviolet light is strongly attenuated by Earth's ozone layer, so that the amount of UV varies greatly with latitude and has been partially responsible for many biological adaptations, including variations in human skin color in different regions of the globe.

Lasers emitting light at the D line, utilising sodium, are used to create artificial laser guide stars that assist in the adaptive optics for land-based visible light telescopes.

The Marxist historian and scientist J. D. Bernal asserted that " the renaissance enabled a scientific revolution which let scholars look at the world in a different light.

* October 10 – Richard D ' Oyly Carte's Savoy Theatre opens in London, the world's first public building to be fully lit by electricity, using Joseph Swan's incandescent light bulbs.

However, in white LED light, the color is equal to the best cornflower blue sapphire, or D block tanzanite ; this is due to the blue garnet's ability to absorb the yellow component of the emitted light.

A number of researchers disagree with this and suggest that the northern latitudes permitted enough synthesis of vitamin D combined with food sources from hunting to keep populations healthy, and only when agriculture was adopted was there a need for lighter skin to maximize the synthesis of vitamin D. The theory suggests that the reduction of game meat, fish, and some plants from the diet resulted in skin turning light many thousands of years after settlement in Europe and Asia.

In summary, the degree of rotation depends on the color of the light ( the yellow sodium D line near 589 nm wavelength is commonly used for measurements ), the path length and the properties of the material ( e. g., or specific rotation and concentration ).

The size of this area is determined by the diffraction-limited resolution of the lens which is given by the Airy disk whose diameter is 2. 4λu / D, where λ is the wavelength of the light, u is the distance between the object and the lens, and D is the diameter of the lens aperture.

Located in Northwest Washington, D. C., it is one of the pre-1900 astronomical observatories located in an urban area ; at the time of its construction, it was far from the light pollution thrown off by the ( then-smaller ) city center.

* Auster D. 6, a 1960 four-seat British light aircraft