Spiderman launches himself straight up at a velocity of 30 m/s. At the top of his trajectory, he fires another web. What are the knowns (givens) at the top of his trajectory?

electromagnetic waves travel through space with vacuums. give me brainliest if right.

c.the charges if the proton and electron and gravity

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.