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Wolfram (tungsten) is resistant to attack of other chemicals as many acids, alkalis and oxygen.
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What is pure tungsten?
As a high performance material, pure tungsten has high melting temperature, high density, low vapor pressure, low thermal expansion combined with good thermal conductivity, sufficient electrical resistance and high modulus of elasticity.
What is considered a high melting point and what is considered a low melting point?
resistance means the te power to resist the heat or the electric current/ eg: tungsten which is used to make the filament of the bulb has a high melting point even when it burns on a high temperature so it has a high resistance, whereas in the wire of an electrical fuse has a low melting point as it burns at a high temperature...
Can any ring be soldered to a tungsten ring?
Tungsten rings can not be soldered at all due to its high melting point and hardness.
Why is tungsten used for high-speed drill bits?
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Why tungsten is used exclusively for making bulb filaments?
Its because Tungsten has a high tolerance to heat, they are also used in industrial saws and drills, because they don not crack at high temperatures.
What is a good conductor and has high resistance?
tungsten
What is the defect if you use tungsten for domestic wiring?
Because tungsten is having high resistance and therefore heat loss will be more
Does tungsten heve high resistance?
Tungsten has a resistivity of 56 x (10 raised to the power of -9) ohm metres. So if we were to compare a tungsten wire with a silver wire of identical dimensions, then we could conclude that the resistance of tungsten is (56/15.9 =) 3.52 times that of silver. This means that the resistance of tungsten isn't particularly high, as it's much lower than some other metals with identical dimensions:
Why tungsten is not as heating element in iron box?
tungsten has high resistivity and resistance but at a higher temperature it becomes hot and oxidised and melted so we can't use tungsten as heating coil
What are novel applications of tungsten alloys?
The hardness and heat resistance of tungsten can contribute to useful alloys. Tungsten's high melting point makes tungsten a good material for applications like submarine ballistics. Tungsten alloys are used in a wide range of applications, including the aerospace and automotive industries and radiation shielding.Superalloys containing tungsten, such as Hastelloy are used in turbine blades and resistants. Tungsten's heat resistance makes it useful in composite applications as can be a highly-conductive metal to withstand the high temperatures.
What is pure tungsten?
As a high performance material, pure tungsten has high melting temperature, high density, low vapor pressure, low thermal expansion combined with good thermal conductivity, sufficient electrical resistance and high modulus of elasticity.
What are some devices that are wired such that they have a high resistance in order to create heat?
A light bulb is the best example. The tungsten creates such a high resistance that all the accumulated heat produces light energy.
Why is tungsten used in cutting tools?
Tungsten is used in cutting tools primarily because it has very high corrosion resistance. Most mineral acids barely even damage the metal.
Light bulbs how does running electricity through the bulb create light?
The electricity runs through a coil of Tungsten. Tungsten has a very high resistance. As per Joule's Law, energy radiated is directly proportional to resistance. The energy radiated is so large that the coil starts to glow and light is produced.
What is a high resistance circuit?
AnswerThe resistance of a material depends on its length, cross-sectional area, and resistivity. This is expressed by the following equation:resistance = [(resistivity x length) / cross-sectional area]So, resistance is directly-proportional to the resistivity and length of the material, and inversely-proportional to its cross-sectional area. So a high resistance can be obtained by increasing the length of the material or by decreasing its cross-sectional area, or by choosing a material with a high resistivity.It's also worth pointing out that resistivity is affected by temperature. For pure metals, the higher the temperature, the higher the resistivity, so the higher the resisistance. For example, a hot (i.e. an operating) tungsten lamp will have a much higher resistance than a cold tungsten lamp.
What are uses for tungsten?
There are many uses for tungsten: Incandescent light bulbs: It makes up the filament of the bulb. It is used in the bulb because it can withstand extreme temperatures. Jewelry: The high scratch resistance and dark shine of tungsten makes it a very popular choice among men for rings and bracelets. Abrasive Coating: Many tools subject to cutting hard metals in harsh conditions are coated with tungsten. The high melting point and hardness of tungsten make it a valuable asset to machinery and cutting tools.
What is the luster of tungsten?
Tungsten has a medium to high luster, shines like silver
