A discharged, conductive, hollow sphere of mass m floats in a dielectric liquid of constant K holding 3/4 parts of its volume out of the liquid. At what potential must the sphere be charged for it to float half its volume Chegg

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.