Why does the sun appear to move across the sky over the course of the day? A. because the sun revolves around Earth B. because Earth revolves around the sun C. because the sun rotates on its axis D. because Earth rotates on its axis. PLease answer quickly next question is 50 points

Atriangle with equal sides of length 10 cm has -2.5-nc charged objects at each corner. part a determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. horizontally rightward vertically downward vertically upward horizontally leftward