Q: A machine made up of two pulleys is used to lift up a load of 200 N through a height of 2 m. a) how much work is done in lifting this load?
b) how far will the effort move during this lifting?
c) what will be the value of the effort needed?

wavelegth as in spectrum red oygbiv

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.

i think its c if i'm wrong