When fire needs oxygen to burn then how the fire in the rocket burns in space?

Answer 1

There are two ways to do that:

-- The fuel that the rocket burns has its own oxygen combined with

the other chemicals in the fuel.

-- The rocket carries oxygen in a separate tank, and mixes it with the

fuel in order for the fuel to burn.

Answer 2

Fire does indeed need oxygen to burn in the presence of atmospheric air on Earth. However, the fire in a rocket burning in space is different from the typical combustion that occurs on Earth.

The flames we see when something burns on Earth are the result of combustion involving oxygen from the surrounding air. In space, there is no atmospheric air, and therefore no free oxygen available for combustion. So, if you were to light a match or a candle in the vacuum of space, it wouldn't produce a flame as we know it on Earth.

However, rockets are equipped with their own oxidizers, which are substances that provide the necessary oxygen to support combustion. The most common rocket fuel used is a combination of liquid or solid fuel and an oxidizer, such as liquid oxygen (LOX), liquid hydrogen, or solid propellants.

In the case of liquid oxygen, it is stored onboard the rocket in a separate tank from the fuel. When the rocket engines are ignited, the fuel and oxidizer are mixed and ignited together in a controlled manner. This chemical reaction releases a large amount of energy, creating hot gases that are expelled through the rocket's nozzles at high speeds, providing the necessary thrust for the rocket to move forward.

Since rockets carry their own oxidizers and don't rely on atmospheric oxygen, they can operate in the vacuum of space, where there is no air or atmosphere. This allows them to travel beyond Earth's atmosphere and into space.