A copper wire has a diameter of 1.02 mm, cross-sectional area 8.2x10-7 m2 and resistivity 1.72 x 10-82 m. It carries a current 1.67 A. Find the electric field magnitude in the wire and the potential difference between two points in the wire 50 m apart. [4] ​

what question you dont ask a question

explanation:

f=ma newton's second law 7x8=56n

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.