(a) Find the mass of a solid iron sphere 2.00 cm in
Chapter 27, Problem 27.61(choose chapter or problem)
(a) Find the mass of a solid iron sphere 2.00 cm in radius. (b) Assume that it is at 20C and has emissivity 0.860. Find the power with which it is radiating electromagnetic waves. (c) If this sphere were alone in the Universe, at what rate would its temperature be changing? (d) Assume Wiens law describes the sphere. Find the wavelength max of electromagnetic radiation it emits most strongly. Although it emits a spectrum of waves having all different wavelengths, model its whole power output as carried by photons of wavelength max. Find (e) the energy of one photon and (f) the number of photons it emits each second. When the sphere is at thermal equilibrium with its surroundings, it emits and also absorbs photons at this rate.
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