Answer: The correct answer is the weight of the wood.
Explanation:
Hope this helps
The first law of thermodynamics is expresses by
D. ΔU=Q-W
which means change in internal energy of system = Heat added to system minus work done by the system
All are expressed in Joules.
This law is based on principle of conservation of energy.
I'm only adept in atomic makeup but my guess would be 13 electrons since they have a negative charge and protons have a positive one.