What holds a moon in its orbit?
A. the heat generated by the planet it orbits
B.
the gravitational pull of the star it orbits
C. its own internal magnetism
D. the gravitational pull of the planet it orbits

In a closed system, the total energy prior to an energy transformation is the total energy after. a. equal to b. unrelated to c. greater than d. less than

When a light bulb shines, it gives off light energy and energy. a. heat b. potential c. chemical d. electrical

Rank the six combinations of electric charges on the basis of the electric force acting on q1. define forces pointing to the right as positive and forces pointing to the left as negative. rank positive forces as larger than negative forces. q1,q2,q3 = positive(+) q1 = + q2 = + q3 = - q1 = + q2= - q3= + q1= - q2= + q3= + q1= + q2= - q3= - q1,q2,q3 = negative