Sean stirred 10 grams of sand into 50 mL of water and 10 grams of salt into 50 mL of water, then he let both mixtures sit for 10 minutes. Which of the following can Sean expect to observe after 10 minutes?

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?