Auniform thin rod of length 0.89 m and mass 1.9 kg lies in a horizontal plane and rotates in that plane about a pivot at one of its ends. the rod makes one rotation every 0.35 second and rotates clockwise as viewed from above its plane of rotation. find the magnitude of the rod’s angular momentum about its rotation axis, in units of kg⋅m2/s.

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.