4) During a lunar eclipse, the sun, earth and the moon are in a straight line shown below.
The mass of the earth is 5.972 x 1024 kg. The mass of the sun is 1.989 x 1030 kg
and is 1.48 x 1011 m away from earth. The mass of the moon is 7.35 x 1022 kg and is
3.84 x 108 m away from earth. During the solar eclipse, what is the net force on
the earth?

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .

the area between the graph and the t axis

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.