What happens if an opaque object is placed in the path of light? a) light bends when it hits the object. b) light does not pass through the object. c) light completely reverses its direction. d) light pierces the object and continues to travel.

Explain earth's motion, using the terms "precession" and "rotation" in your answer.

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 equation for electrical work?