the emissivity of tungsten is approximately 0.65.A tungsten sphere 1cm in radius is suspended within a large evacuated enclosure whose walls are 400K. what power input is required to maintain the sphere at a temperature of 3000K if heat condition along the support is neglected take σ=5.67×10⁻8.

Explain the consequences of this addiction to the brain tissue

Which accounts for an increase in the temperature of a gas that is kept a constant volume

You are a researcher for a golf club manufacturer. you are given two identical looking cubes of a metal alloy. you are informed that they are made of the exact same material, but one is crystalline, whereas the other is amorphous. it is your job to determine which one is amorphous this one is more stress-resistant and is useful in reinforcing golf clubs. which of the following is the best way to determine which is which? a. determine the density of each cube. the more dense one is the amorphous solid. b. melt both cubes and look for a broader range of melting temperatures. the one that melts over a broader range of temperatures is the amorphous solid. c. determine the density of each cube. the less dense cube is the amorphous solid. d. melt both cubes and measure the range of melting temperatures. the one that melts over a narrower range of temperatures is the amorphous solid.