Burning velocity is the speed at which a flame propagates through a combustible gas mixture. It is an important parameter in combustion science, as it helps determine how quickly a fire can spread. Higher burning velocities indicate a more rapid combustion process, which can lead to more intense fires and explosions. Factors affecting burning velocity include the composition of the fuel, the concentration of oxygen, and the temperature of the environment. For example, mixtures of hydrogen and oxygen have high burning velocities, making them more reactive. Understanding burning velocity is crucial for safety in industries dealing with flammable materials.