Heavier than What?
Rockets commonly use liquid propellants like liquid oxygen and liquid hydrogen, or solid propellants like a mixture of a fuel and an oxidizer, such as ammonium perchlorate and powdered aluminum. These fuels provide the energy needed for the rockets to generate thrust and lift off into space.
No. Helium is one of the lightest elements in the world and is not commonly used in any form of transportation. To answer your question the compound used to lift rockets is liquid oxygen.
Liquid oxygen and liquid hydrogen are used as the propellant in the high efficiency main engines of the Space Shuttle. LOX/LH2 also powered the upper stages of the Saturn V and Saturn 1B rockets. Another cryogenic fuel with desirable properties for space propulsion systems is liquid methane.
Rockets do not have lift, they have thrust.
Rockets have potential energy because they store chemical energy in their fuel, which is converted into kinetic energy as the rocket propels forward. As the fuel is burned and expelled out of the rocket, it pushes against the ground or atmosphere, causing the rocket to move and lift off the ground.
Shuttles are powered by a combination of liquid hydrogen and liquid oxygen, known as rocket propellants. These propellants are mixed and burned in the shuttle's main engines to generate the thrust needed for lift-off. The combustion of liquid hydrogen and liquid oxygen produces a high-energy reaction that propels the shuttle into space.
Rockets lift the astronauts into space to do their exploration.
Two huge solid fuel rockets, and Three big rocket motors burning fuel from an external tank big as a grain silo at a ferocious rate.
The heavier it is the stronger the engine has to be. And the stronger the engine the more fuel will it burn. And the more fuel it burns the more fuel has to be carried in the rocket. And the more fuel the rocket has to lift the stronger the engine has to be.
Well it all has to do with propultion like when a shuttle pushes with rocket thrust into space. I wouldn't say that what a rocket does is worthy of the term flight. A rocket simply provides a force that is greater than the force of gravity and thereby gains in altitude provided it is pointed in the right direction to begin with. True flight has to involve the use of air-foils or wings which turn velocity into lift. If you put wings on a rocket then yes rockets are capable of flight in that the rocket provides the thrust necessary to utilize the wings to provide lift.
u beat a grunt....
Rockets lift the astronauts into space to do their exploration.