# Tag Info

1

In a word, no. Getting into space is a matter of achieving enough velocity to overcome the Earth's gravitational influence, not about buoyancy. You can use buoyancy to get to the edge of the Earth's atmosphere, not beyond. We don't fill a rocket with helium so it'll float into space, nor do we use balloons to get beyond the edge of the Earth's atmosphere.

1

The force is given by: $$F = -\frac{dp}{dt}$$ where $p$ is the momentum of the particles being ejected. The momentum is given by: $$p = \frac{mv}{\sqrt{1 - \frac{v^2}{c^2}}}$$ And the momentum is related to the energy by the relativistic equation for the total energy: $$E^2 = p^2c^2 + m^2c^4$$ so: $$p = \frac{\sqrt{E^2 - m^2c^4}}{c}$$ The ...

-4

This is a wonderful question and filled with interesting albeit incomplete or inaccurate answers. Launching an "orbital body" concerns two issues and two issues ONLY namely mass and intertia. So before we "launch" anything we must first understand THE EARTH IS MASSIVE...which works AGAINST the "inertial reality" of a conical shaped item which albeit is ...

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