Current flows in the x-direction through a very large sheet that lies in the xy-plane. To determine the strength of the magnetic field at point P, what Amperian loop should we choose?

a lot of it means it can be "burned" for energy and sold at one price. if it is scarce, the price will go up

jupiter is the largest planet in our solar system, having a mass and radius that are respectively, 318 and 11.2 times that of earth. suppose that an object falls from rest near the surface of each planet and that the acceleration due to gravity remains constant during the fall. each object falls the same distance before striking the ground. determine the ratio of the time of fall on jupiter to that on earth.