Liquid propellants are typically a combination of a fuel and an oxidizer. The fuel provides the energy for the rocket, while the oxidizer provides the oxygen needed for combustion. Common liquid propellants include liquid oxygen (LOX), liquid hydrogen (LH2), kerosene, and hydrazine.
Solid propellants are composed of a mixture of fuel and oxidizer that are in a solid state. When ignited, solid propellants burn rapidly and produce large amounts of hot gas. Common solid propellants include ammonium perchlorate (AP), aluminum, and polybutadiene.
The choice of propellant for a rocket depends on several factors, including the desired performance, the size and weight of the rocket, and the cost.
