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Do reflector panels have high or low emissivity?
low emissivity
Why heat sinks are black anodized?
Radiative heat transfer (heat transfer by electromagnetic radiation) is proportional to e*(T1^4 - T2^4) where T1 is the absolute temperature of the material, T2 is the absolute temperature of the surroundings, and e is the emissivity coefficient. A black material has a high emissivity coefficient, while a silvery material has a low emissivity coefficient. However, the emissivity coefficient cuts both ways, so to speak. A black material in thermodynamic equilibrium with its environment absorbs more radiation, true. But it also emits more radiation (this is necessary for equilibrium to hold). Likewise, a silvery material absorbs less radiation, and also emits less radiation. Conductive heat transfer ensures that the black material on the surface of the heat sink remains hot. The surroundings are at a lower temperature. Therefore T1 and T2 are set, and the heat transferred from the heat sink to the surroundings is simply proportional to e, the emissivity coefficient.
Should thermos have high or low heat capacity?
calorimeters should have a low heat capacity
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.
If you were trying to find a substance that increases in temperature rapidly you should choose a substance with?
A substance with a low heat capacity.A substance with a low heat capacity.A substance with a low heat capacity.A substance with a low heat capacity.
Where Is the starter motor in skoda fabia?
At the rear - the transmission end - of the engine. Down low. Often hidden under a heat shield.
Do shield volcanoes have high silica or low silica?
Shield volcanoes produce low-silica lava.
What shape of volcano is shield volcano?
A shield volcano is low and wide.
What Gas Content does a Shield Volcano have?
Magma in a shield volcano usually has a low gas content.
Does low silica mean shield volcano?
a shield volcano is a low dome shaped volcano so i'd say yes
Should you grill chicken on low or high heat?
you should cook chicken on low, to let the meat cook all the way through
What would cause a rattling noise that comes and goes when you accelerate at low speeds but is not there when going faster?
It could just be the heat shield on the under side of the catalytic converter.
