Ask a physicist.
The mirco waves that heat your coffee, do it by polarizing H2O molecules, inverting their polarization. As the wave passes the molecule flips back to normal position and energy in the form of heat is released, we don't know why.
The energy must come from anti-matter, goes one conjucture. Or there is the hypothesis that the energy is dark matter coming from other dimensions. A bubble theory might explain the forces we experience are the interaction of the field waves of all proximate matter and energy.
I like this last one: It keys with how we now calculate the spins in our solar system, All the matter is in This Universe, It expains why information were getting from distant places keeps upsetting the stardard model, And, its the simplest.
So every time you heat your cup of coffee in a micro-wave oven, the entire colossal functioning of the universe - hicups - and draws a nano-somthing to its inevitable collapse.