A rocket engine

this moveless creation of Robert Goddard. the rocket engine is not the same as a regular engine. A typical engine rotates a crank by igniting gasoline, which pulls on certain pistons. As a result, rotational energy is used to turn the vehicle's wheels. Rotational energy is also used by electric motors to turn fans and spin disks. The rotational energy used by a rocket engine is not used in its operation. They function as reaction engines. The basic concept is that the fuel contained within the rocket's body undergoes a chemical reaction as it exits the rocket's end. The thrust created by this reaction drives the rocket onward. This is an illustration of one of Sir Isaac Newton. nowadays rocket engines are used for different tasks. this creation is changed the human history.
  

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