Help asap Where did the material of the early earth originate?
A . The elements and material of the early earth originates from the death of stars
in the universe.
B . Material came from volcanic explosions on earth.
C . This material originated at the core of the earth.
D . Nuclear fission

How would doubling the made of an object change the objects potential energy

J. j. thomson’s experiment disproved the theory that an atom

Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?