A train that is powered by magnetism and electricity is currently being tested in Japan. A student wants to build a model of this train. Which test will best determine if the model train works? A attach the model train to an electric fan B connect the model train to a solar panel C attach the model train to a bottle rocket connect the model train to an electromagnet​

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.