Sand doesn't burn at all, so, yes.
Locust wood will burn faster, it is softer than oak.
yes
because iron doesn't burn...it melts.
Paper burn faster than plastic due to its thick texture.
yes but it will burn faster than most wood and make sure its about 6 months old
sand
Wood dust has a higher surface area compared to a block of wood, allowing for more oxygen to come in contact with the wood particles. This increased oxygen exposure accelerates the combustion process, causing wood dust to burn faster than a block of wood.
The short answer is you don't. As the burn is black all you can do is sand it out and revarnish the wood.
To effectively remove a burn mark from wood, you can sand the area with fine-grit sandpaper until the burn mark is no longer visible. You can also try using a wood filler to fill in the burn mark and then sand it smooth. Additionally, you can use a wood stain or finish to help blend the repaired area with the rest of the wood.
Under normal circumstances, wood will burn first because it has a lower temperature of combustion than metal. That means a stick will catch fire and burn faster than a piece of steel pipe the same size. In fact, under those normal circumstances mentioned, the stick will burn and be reduced to ash while the steel pipe will not be affected. Many times structures will burn and the steel water pipes will be left only blackened after all the wood has been consumed by the blaze.
Normally soft wood would burn fastest. It actually depends on the density of the wood and the amount of pitch or sap still held by the wood. For instance, soft woods such as pin and cedar, when very dry, burn very fast. However, English brown oak, a hard wood will burn as fast or faster than pine. Balsa, also technically a hardwood, burns very fast. The denser the wood, the slower the burn.
Less dense wood will burn fastest, such as balsa wood. In general, the faster a tree grows, the less dense the wood from that tree will be.