Apendulum that moves through its equilibrium position once every 1.000 s is sometimes called a “seconds pendulum.” what is the period of any seconds pendulum? 1. 4.000 s 2. 2.000 s 3. none of these 4. 1.000 s 5. 0.500 s 6. 0.250 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.