You are walking toward the back of a bus that is moving forward with a constant velocity. describe your motion relative to the bus and a point on the ground.

to the bus you walk at one pace

to the ground you add the bus to your speed

try it on a bus or train ... windows help

wavelength divides in half and speed stays the same.

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.