flammable material
Yes
coal
There are some simple requirments for something to be a convenient fuel - it must be abundant, easily collected and transported, cheap and ideally have a high calorific value per unit volume. Actually the question asked is wrong. Combustible subs. = Combustible materials all combustible subs./combustible materials are fuel but all fuel are not combustible subs/combustible material because fuel can also be an incombustible material/incombustible subs.
Heat and Light
for instance, "it was combustible material". This means it was strong material.
No, oil is combustible.
No, oil is combustible.
yes
flammable material
A flammable material has a lower flash point (100F or below) while a combustible material has a flash point of 100F or HIGHER. In other words, it's a lot easier for a flammable material to catch fire than a combustible one because of the minimal amount of energy (heat) required to get it going versus the higher requirement of a combustible material.
yes.. they are..
Combustible or Flammable
The DOT classification for Spontaneously Combustible material is Division 4.2
Yes
silicone
Silicone & Rubber!