A person whose mass is 80 kg has a surface area on one foot of 0.05 m2. What pressure does the person exert on the ground if standing on both legs?

P=F/A

A=foot1+foot2

A=0.05m2+0.05m2 because it says by two foot

A=0.10m2

>>F=mg=80kg*9.81m/s2=784.8N

P=784.8N/0.10m2

P=7848Pa

conduction, convection, radiation

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.