A bad fire wood is that of

The current consumption of domestic fire wood in India is about

Why do you have to use paper or kerosene oil to start fire in wood ar coal ?

A bullet fired into a block of wood loses half of its velocity after penetrating 3 cm. If the retardation is uniform how much further will it penetrate ?

What do heart wood and sap wood stand for ?

What do hard wood and soft wood stand for?

What do hard wood and soft wood strand for?

A bullet of mass 'm' fired with a velocity 'v' into a fixed log of wood and penetrates a distance 's' before coming to rest. Assuming that the path of the bullet in the log of wood I horizontal, the average resistance offered by the log of wood is