A baseball. 167 grams, is pitched at 50 m/s when is hit by the batter. The ball travels in the
opposite direction it was thrown from with a speed of 70 m/s. What is the change in momentum
of the baseball?

a and c

c is 100% but i am confused in a

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.

answerdmitry mendeleyev made a workable classification of the elements