As the fuel is burned during rocket launches, the hot gasses produced rush out of the bottom of the boosters. This causes the rocket to launch into space.
Describe how hot gasses rushing out of the bottom of a rocket can be used to launch
it into space. Be sure to address the following for 2 points each:

Identify the correct relation showing that the radius r of the orbit of a moon of a given planet can be determined from the radius r of the planet, the acceleration of gravity at the surface of the planet, and the time τ required by the moon to complete one full revolution about the planet. determine the acceleration of gravity at the surface of the planet jupiter knowing that r = 71 492 km and that t= 3.551 days and r= 670.9 × 10^3 km for its moon europa.