Suppose your surface body temperature averaged 90 degrees f. how much radiant energy in w/m^2 would be emitted from your body?

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The Stefan-Boltzmann Law gives the energy radiation per unit area of a black body:

where,

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Keep as many significant figures in as possible. The error will be large when is raised to the power of four. Also, the real value will be much smaller than since the emittance of a human body is much smaller than assumed.

- measure reactants precisely. ( first choice)

- stir to the reaction take place. ( second choice)

- wait patiently until the reaction completes. ( fourth choice)

- make sure to recover as much copper as possible. ( last choice)