What property of the wood would you need to know to predict how fast the wood would start to burn?

The chemical property of combustion.

Explanation:

Combustion is a chemical reaction that occurs between a combustible material, a substance that causes or favors the combustion of other substances that is oxidizer and oxygen, all this accompanied by outgoing energy in the form of heat (exothermic energy) and incandescent energy.

In this case, wood is the combustible material, and combustion is generated by separate energy, fire, phosphors, sparks.

smooth muscle is composed of involuntary muscles found within the walls of organs and structures such as the esophagus, stomach, intestines, and blood vessels. those muscles push materials like food or blood through organs. unlike skeletal muscle, smooth muscle can never be under your control.