because in outer space there is no oxygen
Fire needs oxygen in order to burn, and there is no oxygen in space, so rockets must take oxygen with them.
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Some rockets, such as liquid fuel rockets, carry liquid oxygen (LOX) as an oxidizer in a separate tank. The LOX is then mixed with the rocket's fuel and ignited to create thrust. Other rockets, like solid fuel rockets, have an oxidizer mixed into their solid fuel composition.
The force of energy and oxygen propells bottle rockets.
Water rockets use water and air modern rockets use thrust and oxygen.
Rockets need oxygen to facilitate the chemical reaction for generating thrust. By combining oxygen with fuel in the combustion chamber, rockets produce the hot gases needed to propel the vehicle through space. This enables rockets to overcome the lack of atmospheric oxygen present in space.
Hydrogen and oxygen as fuel
Rockets need to carry their own supply of oxygen because they travel through the vacuum of space where there is no atmosphere to provide oxygen for combustion. By carrying their own oxidizer, such as liquid oxygen, rockets can generate the thrust needed to propel themselves forward.
Rockets carry onboard oxygen for combustion to generate thrust, so they can run out of oxygen if not enough is supplied. However, in space, rockets do not need oxygen from the atmosphere to operate as they bring their own supply. Once the oxygen stored onboard is consumed, the rocket will no longer be able to generate thrust and will not be able to maneuver or maintain its intended trajectory.
Oxygen is used in rockets as an oxidizer to facilitate the combustion of fuel. It helps to support the chemical reaction that generates thrust by combining with the fuel to release energy. This process allows rockets to generate the necessary propulsion for launch and space travel.
A rocket is generally a cylindrically shaped object that is fired into the atmosphere using combustible fuel. Large rockets use oxygen and hydrogen for fuel.
They take it with them in some form or another. Fireworks use oxidizing salts such as various nitrates and chlorates. Solid fuel rockets generally use ammonium perchlorate as an oxidizer while liquid fuel rockets carry liquid oxygen.