Subject: Does a Hot brick weigh more than a cold one?

As I understand it, gravity bends space.  So all things, even light - and 
presumably all electromagnetic radiation, are affected by gravity.  I would 
guess then that all forms of energy affected by gravity.  If so, than HEAT 
energy would be affected by gravity.  

Is the average kinetic energy of the molecules of a substance affected by 
gravity?  If it is, then a hot brick would weigh more than a cold one, although 
I suspect the difference would impossible or nearly impossible to measure.

What do you think?

Re: Does a Hot brick weigh more than a cold one?