Gunowder is basically a fuel, and an oxidizer to make that fuel burn VERY quickly. As it burns, it produces gasses that are very hot- due to the heat, they expand rapidly. These expanding gasses can...
No one knows exactly when gunpowder was invented. It was invented and used in China by9 centrys for firecrackers and incendiary devices thrown by a catapult.
It does not seem that any Bank of England banknotes were introduced in 1752.1725 seems to be the year for the first issue of many notes including the £20, £30, £40, £50 and £100 banknotes.The...