Ablock of iron (mass: 10 kg, density: 7840 kg/m3; c_v: 0.45 kj/kg) is initially at 100 kpa and 30 deg-c. because of external heating, its entropy increases by 5 kj/k. determine the final temperature (in deg-c) of the iron block. use the sl model

he made 11 calls in one day

see earlier answer

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.

there are no contact forces mentioned on the list of choices that you've provided.