Cooling of an Object: Which Hypothesis is Correct?

[scientifico]

Homework Statement

An hot object is positioned on a slab at room temperature (20° C), which of that 2 ipothesis is correct?

1)The object will get cold because of the conduction with the slab, the convection af the air around the object and the electromagnetic radiations it send out.
2)If the slab emissivity is bigger than the object emissivity, the object could heat up.
Thanks!

Homework Equations

Stefen-Boltzmann law

The Attempt at a Solution

I don't know if the second ipothesis is correct and in the first the sending out of electromagnetic radiations can be a trick :(

 

[omoplata]

Looks like it's got something to do with the 2nd law of thermodynamics.