At a certain instant, a particle is moving in the direction with momentum 18 kg·m/s. during the next 0.5 s, a constant force < -4, 12, 0> n acts on the particle. what is the momentum of the particle at the end of this 0.5 s interval?

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.