While passing between earth and the moon, a spacecraft is momentarily located on the line connecting the centers of the two bodies and is at a distance of d = 176 km from a radio antenna on the surface of earth. the distance from the antenna to the moon is denoted by dm. scientists on earth send a command to the spacecraft, which immediately sends back a receipt confirmation signal. how long, in seconds, after the scientists send the command does it take before they learn it was received?

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.

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.