Which of the following line of(latitude or longitude)would represent by 90 north latitude

south pole
equator
primer meridian
north pole
international date line

Could someone me find the answer to this problem.

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.

Mark creates a graphic organizer to review his notes aboutelectrical force.which labels belong in the regions marked x and y?