A metal sphere of radius 0.526 meters, temperature 27.3 ° C, and emissivity 0.851 is located in an environment of temperature 77.2 ° C. What is the sphere’s net rate of energy exchange with its environment?
show your method if possible,thanks
2006-06-27 20:30:33 · 1 answers · asked by Sagely 4 in Science & Mathematics ➔ Physics
find the surface area first (thats easy). Then given that the emissivity of th sphere is .851, and that the rate of change will be the change of temp/time. Since there is no time involved directly, we need to have the Surface area x emissivity rate / the temperature difference (in relation to the time, which is given within the emissivity rate). This should give u the net rate, depending on the emissivity/time relationship. You do the working out, otherwise you won't learn it.
2006-06-27 20:44:49 · answer #1 · answered by Anonymous · 0⤊ 0⤋