La razón por la que los cohetes queman combustible en el vacío Feynman Explica

The Reason Rockets Burn Fuel in a Vacuum | Feynman Explains | Conservation of Momentum, Newton's Third Law, Tsiolkovsky's Equation, and Rocket Propulsion Explained. If there's no air in space, what does the rocket push against? The knee-jerk answer is wrong. And the correction changes everything: rockets work better in a vacuum than in the atmosphere. Space isn't the problem—it's the ideal environment for reaction propulsion. In this video, Richard Feynman explains why Newton's Third Law means the rocket pushes the gases backward and the gases push the rocket forward—without needing anything from the environment. How the conservation of linear momentum makes the rocket's motion mathematically inevitable when the gases are pushed backward. Why a vacuum eliminates both sources of atmospheric interference and produces higher specific impulse. Tsiolkovsky's rocket equation and why 85-90% of a rocket's mass at liftoff must be propellant—not due to inefficiency, but due to unavoidable mathematics. How the De Laval convergent-divergent nozzle converts thermal energy into supersonic gas speed. And why regenerative cooling—using the cold propellant itself to cool the chamber before burning it—is the elegant solution that the physics of the problem makes almost inevitable. A rocket in a vacuum is the purest demonstration of momentum conservation there is. No friction. No drag. Just the system splitting into two parts going in opposite directions. Subscribe for more Feynman-style videos on physics, aerospace engineering, and the principles behind space exploration. Disclaimer: This video uses artificial intelligence to recreate Dr. Richard Feynman for educational purposes only. We are not affiliated with his family or any official institution. All scientific content is real and verified.