A500 kg car traveling at 20 m/s, brakes and skids to a stop. if μk = 0.7 between the tires and the road, the acceleration of the car during the skid is:

a. -0.7 m/s2

b. -7.0 m/s2

c. -2.0 m/s2

d. -0.2 m/s2

c) up is the direction the magnetic force is acting on the charge.

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.

this would be about 43%