Heavier than What?
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.
Rockets do not have lift, they have thrust.
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.
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.
The National Aeronautics and Space Administration (NASA) uses rockets to lift payloads out of the earth's gravity well and into space.
Rockets lift the astronauts into space to do their exploration.
Rockets lift the astronauts into space to do their exploration.