Fuel that is not a liquid or solid can be a gas. Many road vehicles use natural gas or propane but I have not heard of an aircraft that does.
Fuel that is not a liquid nor a solid is probably gaseous - like the natural gas we use for our cars.
GAS I take it this is an American answering. As a British person, OIL is a liquid fossil fuel, COAL is a solid fossil fuel and NATURAL GAS is a gaseous fossil fuel.
Some fossil fuels are liquid (oil) some are solid (coal) and some are gas (natural gas)
General classes of colloids are: gas in liquid, gas in solid, liquid in gas, liquid in liquid, liquid in solid, solid in gas, solid in liquid, solid in solid.
Solid, liquid and gas
Pebbles are solid.
liquid fuel
There are solid rocket fuels, and there are liquid rocket fuels.
Diesel fuel is not a solid or gas, but rather a liquid. It is a common fuel source for large industrial equipment.
There are many examples, depending upon the use. Most often, liquid fuel is described as an option as compared to solid fuel. Rockets are one example where both solid and liquid fuels may be used. Liquid hydrogen is the common rocket liquid fuel. Cooking stoves can use solid or liquid fuel, in addition to gas. The most common cooking stove liquid fuel is alcohol.
Solid fuel: coal, wood Liquid fuel: kerosine, gasoline Gas fuel: methane, hydrogen
There are two main types of rockets: liquid-fuel and solid-fuel. Liquid-fuel rockets consist of a fuel and oxygen (or other oxidizer) in liquid state. They are combined in a combustion chamber and ignited. The fuel flow to the engine can be controlled, the amount of thrust produced can be regulated and the engine can be turned off or on as needed. Solid-fuel rockets consist of a fuel and oxidizer that are pre-mixed in a solid form. Once the solid fuel is ignited, the resulting thrust cannot be regulated or turned off. This fuel system is simpler, safer, and cheaper-but less efficient-than that of a liquid-fuel rocket.
Coal is a solid, Natural gas is a gas and Oil is a liquid.
diesel is a liquid fuel at the gas pumps.
There are two main types of fuel: solid fuel and liquid fuel. Rocket fuel most use both a fuel and an oxidizer. The solid fuel in most modern rockets uses aluminum powder as fuel, ammonium perchlorate as an oxidizer, and iron oxide as a catalyst. Liquid fuel uses liquid hydrogen as fuel and liquid oxygen as an oxidizer.
gaseous fuel: natural gas liquid fuel: kerosene solid fuel: coal I found it at a useful website: http://www.jrwhipple.com/sr/fuel_info.html
The SRBs (Solid Rocket Boosters) use solid fuel. The 3 main engines and the OMS (Orbital Maneuvering System) use liquid fuel stored in the External Tank.
Rocket fuel is either liquid or solid. Other kinds are being developed.