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What is a general value for Surface Emissivity for 6mm float glass?
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∙ 11y ago
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∙ 11y ago
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How does a silver surface work in radiation?
The concept involved here is Emissivity - the ability to emit energy. e is the usual symbol, and a perfect emitter would have an e of 1. Your perfect black body will have this emissivity of 1.A highly polished surface (polished at all the wavelengths concerned) will have an emissivity much smaller. Polished silver has an emissivity of about 0.02.In general the emissivity of a surface is inversely related to its reflectance, but this does vary with the surface finish, colour, and the mass of the object.It is worth noting, that low emissivity glass is used with effect in the double glazing of windows.
Why can a sewing needle can float on the surface of water in glass?
Surface tension
Why can a sewing needle can float on the surface of water in a glass.?
Surface tension
Explain why a swing needle can float on the surface of water in a glass?
Due to surface tension, the upper surface of water acts like a stretched membrane which enables it to float a swing needle.
Why can a sewing needle can float on the surface water in a glass?
Yes if the surface tension of the water is not broken. If you are careful you can place a needle on the surface of the water in a glass. Also if you reduce the surface tension with detergent (just a very little is enough) the needle will sink because it's density is greater than that of the water. NO (if the surface tension of the water is broken, a needle cannot float on the surface of water. This is because the needle has higher density than water (density is mass divided by volume).
Who invented float glass?
Float glass was first invented by a company in England called Pilkington Glass.
If a raisin is dropped in a glass of champagne it will sink and settle down in the glass?
Yes, the raisin will sink into a glass of champagne, but not for long ... the bubbles from the champagne will inflate the dried raisin and it will float up to the surface.
how to tell if diamond ring is real?
Drop the stone in a glass of water and see if it sinks to the bottom. Due to its high density, a real diamond will sink. A fake one will float at the top of the surface or in the middle of the glass.
Does a glass float or sink in water?
It depends on the shape of the fork and the material from which it is made. Most non-metal (wood, plastic) forks will float. Metal forks will sink unless they are shaped to have a large enough surface area on the bottom.
Can we use float cullet in container glass?
Cullets doesn't float on water.
What is ordinary glass?
normal float glass screen is made of a number of glass sheets which can be standard.
Density of clear float glass?
The density of clear float glass, according to Pilkington Ltd., its original manufacturer, is 2.5 g.cm-3.
