Obi wan hears the destruction of a planet and all of its people through 'the force'. these sounds are only in his head and are not carried through space, since space has no through which sound could transmit. electromagnetic wave electrons medium magnetic field

Medium, space is empty , sound needs some type of material to travel through.

e

explanation:

there is no change in the electric potential energy as it is in rest on both conditions.

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.