Choose the word from the drop-down menu that completes each sentence. A/An star system is made of two stars. A/An star system is made of no more than a few thousand stars. A/An star system is made of more than a million stars. the answer in order is :
Binary
open cluster
globular cluster

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?