Palms

Want a men’s ring that could have black incorporated on it so titanium and tungsten are the choices. I need something that conducts less electricity and if it’s a significant difference between the two. Also is one cheaper in quality than the other as in weight and durability?

Tungsten is a better conductor than titanium by a factor of about 6 (see link). This has nothing to do with atomic number though: the best conductor is silver, followed by copper, and then aluminum. Note that despite this difference, both are fully metallic and will conduct electricity well – you wouldn’t use titanium in wires, but you wouldn’t use it as an insulator either.

Both metals are durable. Titanium is protected from corrosion by a tough oxide layer, which can be altered by electrolysis to produce a colored layer on the titanium. Titanium is actually less strong than hardened steel, and it is a very light metal, being used a lot in airplanes. Tungsten is very dense – the same density as gold – and is hard and brittle. Tungsten has the highest melting point of any metal, meaning that tungsten objects such as rings will be sintered rather than cast (made from powder pressed together while hot), which makes it more brittle (the stuff used to armor tanks is steel with some tungsten added, which is stronger than ordinary steel). I would expect both metals to be about the same price.

Tungsten and gold wires of equal length are found to have the same resistance. What is the ratio of their radii?

the resistance of a wire is given by

R= pho L/A

R=resistance
rho = resistivity
L=length
A=area

the best way to approach this is to take the ratio of resistances, using "1" for Tungsten values and "2" for gold:

R1/R2= rho 1 L1/A1 / (rho 2 L2/A2)= (rho1/rho2)(A2/A1)

looking up values on line, the resisitivity of tungsten is 5.28×10^-8 ohm -meters, and gold’s is 2.44×10^-8 ohm-m

since rho tungsten = 2.16 rho gold…then the A of the gold wire must be 2.16 times the area of the tungsten wire…since area goes as radius^2, the radius of the gold wire must be sqrt[2.16] times the radius of the tungsten wire, or 1.47 times greater

My husbands band is Tungsten, and he absolutely loves it. Unfortunately it is giving him a rash ( it mostly happens during warmer weather) can you apply a platnium or a white gold coating inside of the band?

Yes to gold and platinum,however,both will wear off in a couple of years. Titanium nitride (TiN) plating will last many, many times longer and it is gold in color and looks good.Also more compatible with tungsten.

the light bulb is plugged into a 120V outlet and draws a current of 1.24 A. If the radius of the tungsten wire is 0.003mm how long must the wire be?

This question is a mix of Ohm’s law and an understanding of resistance.

We know that Ohm’s law will allow us to calculate the resistance of the wire.
V=IR -> 120=1.24*R
So R=96.77ohms

Next use the formula for resistance: R=rho(L/A) Where L is the length of the resistor (in your case wire) and A is the area of the cross section of the resistor.
Knowing R is 96.77…

96.77=rho[L/(2*pi*radius)]
You have the radius however you need to look up the value of rho (resistivity constant) for tungsten which I do not know off hand. Do some algebra and find L and you’re in the clear.

Most tungsten carbide jewelry is bonded by nickel, but some are still bonded with cobalt. Any chance that the cobalt would rust?

Rust is a poor choice of words. Think of it as tarnishing. Tungsten rings made with a cobalt binder instead of nickel will tarnish. The cobalt in the ring reacts from the secretions of your skin which tarnishes the ring. It is more cost effective to make tungsten rings with cobalt, however; tungsten rings made with cobalt will tarnish. You should spend a little more money and get a tungsten ring made with a nickel binder.

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Pequeña revisión de una PDA Palm Tungsten E2

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Unique tungsten carbide wedding band ring for men. 9mm wide and with spikes no the center piece that can spin around the wedding ring. Comfort fit, hypoallergenic, scratch proof; this ring is the ultimate Tungten carbide wedding band ring that will last you a lifetime. Visit PerryOlsen.com website for wedding band rings in materials such as platinum, titanium, tungsten carbide, black zirconium, black ceramic, 14K and 18K gold, and more. Click on the below link to see all our Tungsten carbide rings:

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Just now I’m having a problem to look for a tig tungsten electrode. I hope to get some help webpage or something to buy it. I’ll be glad to get suggestions from you. Looking forward to your answers!

Your choice is a tig tungsten electrode and I can say where you may have it. Get here: http://seerch.com/category/600/Tig-Tungsten-Electrodes/ . I hope you’ll find what you were looking for.

Tungsten Rings Don’t Scratch
www.JewelryVortex.com

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