Why would an observer out in space see the moon orbiting the earth rather than the earth orbiting the moon? A. The earth's gravity pulls on the moon, rather than the moon's gravity pulling on the earth.

B. The same side of the moon always faces the earth.

C. The moon has much less mass than the earth.

D. The same force that pulls an apple to earth pulls the moon toward the earth.

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?

What is the coefficient of kinetic friction μk between the block and the tabletop?

Ain is , is 's of ? 0.62 0.79 1.27 1.50