Two blocks of unequal Mass are tied together with a massless string that does not stretch and connected via a frictionless and massless pulley. Mass one, M_1, rest on a frictionless table top. Mass two, M_2, is released and both blocks begin to move. The blocks accelerate at the same rate since they are connected. What is the acceleration?​

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.