the answer is in the physics of a rocket engine. in a (as in the shuttle) convergant divergant nozzle rocket. the fuel is mixed and burned on one side of a throat, inside of a chamber that can be thaught of as two bells touching at the top. the burning creates pressure and the pressure is exhausted through the other bell housing (the one you see on the bottom of the shuttle). the exhausting gas is super-sonic (and in some cases hyper-sonic). this happens when the high pressure gas travels through the throat and is compressed while flowing through it (this is part of rockets called compressible flow) and exactly (or near enough to exactly as anyone really cares) at the throat, the flow reaches mach 1. after that point, the flow is ejected from the other bell housing and it's rapid speed is what is used to make the space ship fly. the speed is needed, because the faster you make an object move, the more energy it has (and the more useable energy). if the burned gas was exiting the rocket at 2 mph, it would certainly have energy, but we couldn't use it (low quality of energy). this imense speed allows for easy access to the gas's energy as it moves away from the ship (because if you push on an object, you move away from the object, and it moves away from you; every action has an equal an oposite reaction). the rocket essentially pushes on the gas, exiting the ship, to propel itself in the oposite direction.
Because its the type of fuel that a rocket would need because in rockets you need fast fuel right? And hydrogen is that fast fuel!
Solids: Rockets that use solid propellants to generate thrust, like the boosters on the Space Shuttle. Liquids: Rockets that use liquid propellants, such as liquid oxygen and liquid hydrogen, like the engines on the Falcon 9. Hybrid: Rockets that use a combination of solid and liquid propellants, offering a balance between simplicity and performance, like the SpaceShipTwo.
Helium is not typically used as a fuel in rockets. It is most commonly used in rocket propulsion systems as a pressurizing agent in liquid fuel rockets to push the fuel into the combustion chamber for efficient burning.
Helium is used to pressurize liquid-fuel rockets because it is inert, lightweight, and non-corrosive, ensuring it does not react with the rocket's fuel or oxidizer. It helps maintain a steady flow of fuel and oxidizer to the engines by keeping the propellant tanks pressurized. Additionally, helium's low boiling point allows it to remain in a gaseous state at low temperatures, which is crucial for spacecraft operating in the vacuum of space.
Gasoline is a combination of several different liquid hydrocarbons, including octane (trimethylpentane), toluene, benzene, and others. It is designed as a motor fuel for internal combustion engines.
All substances have a liquid form, but may not be present in nature. Under extreme pressure and temperature circumstances, liquid oxygen can be created, in fact, it is used to fuel space rockets.
A solid fuel rocket engine is just what it sounds like. The fuel inside the rocket is completely solid. In a liquid fuel rocket the fuel is a liquid. Bottle Rockets that you can buy in many stores are fueled with Solid Fuel. Most liquid fuel rockets contain 2 different types of fuel. Once that fuel is mixed and ignited you get your thrust.
The two main types of rockets are liquid fuel rockets, which use liquid propellants like liquid oxygen and kerosene, and solid fuel rockets, which use a solid mixture of fuel and oxidizer. Liquid fuel rockets offer more control and efficiency, while solid fuel rockets are simpler in design and more reliable.
Three main types of rockets that power modern spacecrafts are liquid-propellant rockets, solid-propellant rockets, and hybrid rockets. Liquid-propellant rockets use liquid fuel and oxidizer, solid-propellant rockets use solid fuel and oxidizer mixed together, and hybrid rockets use a combination of solid and liquid propellants.
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.
Rockets commonly run on liquid fuel, solid fuel, or a combination of both. Liquid fuel rockets use liquid oxygen and liquid hydrogen, while solid fuel rockets use a solid propellant mixture. Both types of rockets generate thrust through a controlled combustion process.
Solid-fuel rockets: These rockets use a solid propellant that is burned to create thrust. Liquid-fuel rockets: These rockets use liquid propellants, typically a fuel and an oxidizer, that are mixed and burned to produce thrust. Hybrid rockets: These rockets use a combination of solid and liquid propellants for propulsion. Ion propulsion rockets: These rockets use ionized gas accelerated by electromagnetic fields to generate thrust. Nuclear thermal rockets: These rockets use a nuclear reaction to heat a propellant, typically hydrogen, for propulsion.
Fuel is typically stored in rockets either as liquid fuel in fuel tanks or as solid fuel in a casing. Liquid fuel rockets have separate tanks for liquid oxygen and liquid hydrogen or kerosene, while solid fuel rockets have a solid propellant mixture in a casing. Both types of fuel storage systems are designed to be safe, efficient, and controlled during flight.
Heavier than What?
Solid fuel rockets use a solid propellant mixture, which is more stable and easier to store compared to liquid fuel rockets that use liquid propellants. Iron rockets typically refer to solid fuel rockets using iron particles as part of the propellant mixture to enhance thrust. Overall, solid fuel rockets are simpler and more reliable but lack the efficiency and flexibility of liquid fuel rockets.
The earliest rockets--i.e., those built by the Chinese as early as the 14 century--used solid fuel.
Solids: Rockets that use solid propellants to generate thrust, like the boosters on the Space Shuttle. Liquids: Rockets that use liquid propellants, such as liquid oxygen and liquid hydrogen, like the engines on the Falcon 9. Hybrid: Rockets that use a combination of solid and liquid propellants, offering a balance between simplicity and performance, like the SpaceShipTwo.
Kerosene is a commonly used fuel for liquid-fuel rockets due to its high energy content and ease of handling. However, the choice of fuel depends on various factors such as specific mission requirements, engine design, and cost considerations. Other fuels like liquid hydrogen or methane may be chosen for different rockets based on their performance characteristics.