Plz answer these two questions. I am so sick. if u ddo it would mean a lot.

Avalue that describes how heavy an object is and is related to the force of gravity is

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.

What is offspring? why does a longer life span mean a higher chance of producing offspring?