Two people each do 100 joules of work by pushing a crate to the right. During this process, 50 joules of heat is generated from the friction between the floor and the crate. How much energy is gained by the crate during this process?

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.