Christmas lights

The rule of thumb for fairy lights when decorating trees is to use between 150 and 300 lights per foot of tree heights. Ionic equation:. The Holiday Trail of Lights is a joint effort by cities in east Texas and northwest Louisiana that had its origins in the Festival of Lights and Christmas Festival in Natchitoches, started in 1927, making it one of the oldest light festivals in the United States. A precipitate should form, which then dissolves upon adding excess ammonia, to form an ammonia complex, tetraaminecopper(II). from the 1960s, beginning in tract housing, it became increasingly the custom to completely outline the house (but particularly the eaves) with weatherproof Christmas lights. Add aqeuous ammonia. In the U.S. Ionic equation:.

Be sure to check the label for this and any additional warnings. A blue precipitate of copper(II) hydroxide should form, by the displacement of the copper ions by sodium ions. Proposition 65 of California requires that if products contain lead or traces of lead then a warning must be printed on packing of products. Add aqueous sodium hydroxide. It should also be noted that many light sets may contain traces of lead, and consumers should wash hands thoroughly after handling these products, especially before eating. Copper (I) and Copper (II) can also be referred to by their common names cuprous and cupric. If the strand has nothing attached, or has blown repeatedly, the strand may contain a short and should be discarded. Copper (II) compounds : copper(II) carbonate, copper(II) chloride, copper(II) hydroxide, copper(II) nitrate, copper(II) oxide, copper(II) sulfate, copper(II) sulfide.

If you blow a fuse, unplug the strand from the power source and reduce the number of lights immediately. Copper (I) compounds : copper(I) chloride, copper(I) oxide. Most light sets come with built in fuses to help protect against overheating and to prevent your house's fuses or circuit breakers from being tripped. Copper oxides are used to make yttrium barium copper oxide (YBa₂Cu₃O_7-δ) or YBCO which forms the basis of many unconventional superconductors. If you have questions, consult the manufacturer's instructions or an electrician. There are two stable copper oxides, copper(II) oxide (CuO) and copper(I) oxide (Cu₂O). Other factors include the voltage of the set and the size of the wiring in the set. It is used as a fungicide, known as Bordeaux mixture.

The number of strands of continuous light sets that may be safely conjoined varies based on whether the lights are LEDs, ordinary miniature light bulbs, or the larger C7/C9 type light bulbs. Copper(II) sulfate forms a blue crystalline pentahydrate which is perhaps the most familiar copper compound in the laboratory. Remember that the electronic controller in such sets is also not line isolated! Animated Christmas light sets, including fiber optic ones should never be watched by persons having photosensitive epilepsy. Copper(II) carbonate is green from which arises the unique appearance of copper-clad roofs or domes on some buildings. One should always unplug a Christmas light set that has no transformer before repairing it. Under unusual conditions, a +3 state can be obtained. This is still done rarely, but is not recommended, because it is very dangerous!. Common oxidation states of copper include the less stable copper(I) state, Cu⁺¹; and the more stable copper(II) state, Cu⁺², which forms blue or blue-green salts.

Even before that, Christmas trees were illuminated by candles. Formed in 1967, its principal members were Chile, Peru, Zaire, and Zambia. These sets were very power hungry and are used less widely nowadays. The Intergovernmental Council of Copper Exporting Countries (CIPEC), defunct since 1992, once tried to play a similar role for copper as OPEC does for oil, but never achieved the same influence, not least because the second-largest producer, the United States, was never a member. In the past, Christmas light sets used line-voltage (120 or 240 volts depending on what country) lightbulbs, similar to those used in refrigerators, connected in parallel. The average abundance of copper found within crustal rocks is approximately 68000 parts per billion by mass, and 22000 parts per billion by atoms. Fiber-optic Christmas trees can also be animated electronically, but more often this is done by means of a rotating color filter disc. Examples include: Chuquicamata in Chile and El Chino mine in New Mexico.

They control interleaved strings: commonly red, green, blue and yellow, or other combinations such as red, green and white. Most copper ore is mined or extracted as copper sulfides from large open pit mines in copper porphyry deposits that contain 0.4 to 1.0 percent copper. The microcontroller has three or four outputs which are connected to transistors or thyristors. Minerals such as the carbonates azurite (Cu₃(CO₃)₂(OH)₂) and malachite (Cu₂CO₃(OH)₂) are sources of copper, as are sulfides such as chalcopyrite (CuFeS₂), bornite (Cu₅FeS₄), covellite (CuS), chalcocite (Cu₂S) and oxides like cuprite (Cu₂O). The animation modes are changed by pressing a button. Copper can be found as native copper in mineral form. An electronic Christmas light controller usually has a diode bridge followed by a resistor-based voltage divider, a filter capacitor and a fixed-program microcontroller. At concentrations higher than 1 mg/L, copper can stain clothes and items washed in water.

This is done by using special flasher or "interrupter bulbs" or electronically. The metal, when powdered, is a fire hazard. Christmas lights can be animated. However it is unknown at this stage whether the copper contributes to the mental illness, whether the body attempts to store more copper in response to the illness, or whether the high levels of copper are the result of the mental illness. These devices always have line isolation step-down transformer, because they have only one or two bulbs or LEDs. In addition, studies have found that people with mental illnesses such as schizophrenia had heightened levels of copper in their systems. They have light bulbs or LEDs in the tree base and many fiber optic wires going to the leaves of the tree. This disease, if untreated, can lead to brain and liver damage.

They are usually incorporated into an artificial Christmas tree. An inherited condition called Wilson's disease causes the body to retain copper, since it is not excreted by the liver into the bile. There are even Christmas light sets that use fiber optic technology. In toxicity, copper can inhibit the enzyme dihydrophil hydratase, an enzyme involved in haemopoiesis. There is also the "wall wart" transformer which may be difficult to plug in certain places. The DRI Tolerable Upper Intake Level for adults of dietary copper from all sources is 10 mg/day. These sets are much safer, but there is a voltage drop at the end of the string (less noticeable with LED than incandescent). The suggested safe level of copper in drinking water for humans varies depending on the source, but tends to be pegged at 1.5 to 2 mg/l.

Other setups include lightbulb or LED-based strings with a line isolation step down transformer with bulbs or LEDs connected in parallel (LEDs have current limiting resistors). Thirty grams of copper sulfate is potentially lethal in humans. All battery-powered lights are wired in parallel. All copper compounds, unless otherwise known, should be treated as if they were toxic. Neon lamp based strings have lamps connected in parallel, each with its own current-limiting resistor. The RDA for copper in normal healthy adults is 0.9 mg/day. Lightbulbs or LEDs are usually connected in series to be powered from mains without a transformer (LED-based strings, of course, have a current-limiting resistor). It is believed that zinc and copper compete for absorption in the digestive tract so that a diet that is excessive in one of these minerals may result in a deficiency in the other.

Common technologies are incandescent light bulbs and now LEDs. [1]. In modern times, Christmas lighting devices can be based on different technologies. The blood of the horseshoe crab, Limulus polyphemus, uses copper rather than iron for oxygen transport. In recent times, many city skyscrapers are decorated with long mostly-vertical strings of a common theme, and are activiated simultaneously in Grand Illumination ceremonies. Copper is found in a variety of enzymes, including the copper centers of cytochrome c oxidase and the enzyme superoxide dismutase (containing copper and zinc), and is the central metal in the oxygen-carrying pigment hemocyanin. Soon, strings of lights adorned mantles and doorways inside homes, and ran along the rafters, roof lines, and porch railings of homes and businesses. When copper is first absorbed in the gut it is transported to the liver bound to albumin.

Over a period of time, strings of Christmas lights found their way into use in places other than just Christmas trees. Copper is carried mostly in the bloodstream on a plasma protein called ceruloplasmin. Each socket took a miniature two-candlepower carbon-filament lamp. Copper is essential in all higher plants and animals. of Harrison, New Jersey. In alchemy the symbol for copper was also the symbol for the planet Venus. The first commercially produced Christmas tree lamps were manufactured in strings of multiples of eight sockets by the General Electric Co. Copper was associated with the goddess Aphrodite/Venus in mythology and alchemy, owing to its lustrous beauty, its ancient use in producing mirrors, and its association with Cyprus, which was sacred to the goddess.

It was a huge specimen, featuring more than a hundred multicolored lights. Brass, an alloy of zinc and copper, was known to the Greeks but first used extensively by the Romans. President Grover Cleveland proudly sponsored the first electrically lit Christmas tree in the White House. The transitional period in certain regions between the preceding Neolithic period and the Bronze Age is termed the Chalcolithic, with some high-purity copper tools being used alongside stone tools. In 1895, U.S. The use of bronze was so pervasive in a certain era of civilization that it has been named the Bronze Age. From that point on, electrically illuminated Christmas trees, indoors and outdoors, grew with mounting enthusiasm in the United States and elsewhere. High levels of arsenic in his hair suggests he was involved in copper smelting.

However, it was published by a Detroit newspaper reporter, and Johnson became the Father of Electric Christmas Tree Lights. In Europe, Oetzi the Iceman, a well-preserved male dated to 3200 BC, was found with a copper-tipped axe whose metal was 99.7% pure. Local newspapers ignored the story, seeing it as a publicity stunt. Note that these dates are affected by wars and conquest, as copper is easily melted down and reused. He proudly displayed his Christmas tree, which was hand-wired with 80 red, white and blue electric incandescent light bulbs the size of walnuts, on December 22, 1882 at his home on Fifth Avenue in New York City. By 1200 BC excellent bronzes were being made in China. While he was vice president of the Edison Electric Light Company, a predecessor of today's Con Edison electric utility, he had Christmas tree light bulbs especially made for him. Use of copper in ancient China dates to at least 2000 BC.

Johnson, an associate of inventor Thomas Edison. The Egyptians found that adding a small amount of tin made the metal easier to cast, so bronze alloys were found in Egypt almost as soon as copper was found. The first known electrically-illuminated Christmas tree was the creation of Edward H. In one pyramid, a copper plumbing system was found that is 5000 years old. . There are copper and bronze artifacts from Sumerian cities that date to 3000 BC, and Egyptian artifacts in copper and copper alloyed with tin nearly as old. Christmas lights come in a dazzling array of configurations and colors. The earliest signs of gold use, by contrast, appear around 4000 BC.

Christmas lights (also sometimes called fairy lights or twinkle lights) are strands of electric lights used to decorate homes and Christmas trees during the holiday season, mostly in the West. By 5000 BC, there are signs of copper smelting, the refining of copper from simple copper oxides such as malachite or azurite. The Oklahoma alternative rock band Flaming Lips becamse known in their early days for covering their instruments in christmas lights. A copper pendant was found in what is now northern Iraq that dates to 8700 BC. The film has become an annual holiday favorite in many families. Copper was known to some of the oldest civilizations on record, and has a history of use that is at least 10,000 years old. His attempt at a "Grand Illumination" for a family reunion is one of the high points of the story. From this, the phrase was simplified to cuprum and then eventually Anglicized into the English copper.

In the 1989 film National Lampoon's Christmas Vacation, actor Chevy Chase attempts to follow American family Christmas traditions with elaborate Christmas lights and decorations on the exterior of the family home. In Roman times, it became known as aes Cyprium (aes being the generic Latin term for copper alloys such as bronze and other metals, and Cyprium because so much of it was mined in Cyprus). Development of wiring in parallel and shunts in individual bulb bases were technological (and practical) improvements welcomed by many users. Copper was a very important resource for the Romans and Greeks. Christmas light strings wired in series were often of the type where if one bulb burned out or was loose, an entire string would not illuminate. In Greek times, the metal was known by the name chalkos (χαλκός). Copper is malleable and ductile, and is used extensively, in products such as:.

Monel metal is a copper/nickel alloy, also called cupronickel. There are numerous alloys of copper—speculum metal is a copper/tin alloy, brass is a copper/zinc alloy, and bronze is a copper/tin alloy. The vast majority of radioisotopes have half lives on the order of minutes or less; the longest lived, ⁶⁴Cu, has a half life of 12.7 hours, with two decay modes, leading to two separate products. There are two stable isotopes, ⁶³Cu and ⁶⁵Cu, along with a couple dozen radioisotopes.

Copper is insoluble in water(H2O) as well as isopropanol, or isopropyl alcohol. Contrast this with the optical properties of silver, gold and aluminium. Copper has its characteristic color because it reflects red and orange light and absorbs other frequencies in the visible spectrum, due to its band structure. Copper is a reddish-coloured metal, with a high electrical and thermal conductivity (among pure metals at room temperature, only silver has a higher electrical conductivity).

. Copper is a chemical element in the periodic table that has the symbol Cu and atomic number 29. of Delaware, Horseshoe Crab Fun Facts Accessed 12-12-2005. NOAA and Univ.

Copper: Technology & Competitiveness (Summary) Chapter 6: Copper Production Technology; Author: Office of Technology Assessment 2005. Los Alamos National Laboratory - Copper. Copper was sometimes used by the Inuit to make the cutting blade for ulu's. As a material in the manufacture of computer heatsinks, as a result of its superior heat dissipation capacity to aluminium.

It is used in gardening powders and sprays to kill mildew. Copper(II) sulfate is used as a poison and a water purifier. Compounds, such as Fehling's solution, have applications in chemistry. Copper doorknobs are used by hospitals to reduce the transfer of disease, and Legionnaire's Disease is supressed by copper tubing in air-conditioning systems.

Bacteria will not grow on a copper surface because it is biostatic. As a biostatic surface in hospitals, and to line parts of ships to protect against barnacles and mussels, originally used pure, but superseded by Muntz Metal. Musical instruments, especially brass instruments. As a component in ceramic glazes, and to color glass.

Sterling silver, if it is to be used in dinnerware, must contain a few percent copper. Most flatware (knives, forks, spoons) contains some copper (nickel silver). In cookware, such as frying pans. As a component of coins, often as cupronickel alloy.

cupronickel and Monel, used as corrosive resistant materials in shipbuilding. Alloyed with nickel, e.g. There is increasing use of copper in integrated circuits, replacing aluminium because of its superior conductivity. Wave guides for microwave radiation.

Vacuum tubes, cathode ray tubes, and the magnetrons in microwave ovens. Electrical relays, electrical busbars and electrical switches. Watt's steam engine. Electrical machines, especially electromagnetic motors and generators.

Electromagnets. Statuary: The Statue of Liberty, for example, contains 179,200 pounds (81.3 tonnes) of copper. Doorknobs and other fixtures in houses. Copper plumbing.

Copper wire.