When investigating a crime scene, Grant finds some evidence that could possibly be blood. What should he do? ОА. .
He should leave it alone because it could be dangerous.
OB.
Ос.
He should wear latex gloves when he collects it.
He should pour water on it to see if it rinses away.
He should call a forensic pathologist to help him.
OD.

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?