Two students push on a box in the same direction and a third student pushed in the opposite direction. What is the net force on the box if each push with a force of 50 N? push with a force of 50 N?

The answer would be 0 N as a net force.

Reasoning:

All of the students push with the same force, making the overall force balanced. If a force is balanced, this means that the net force is automatically 0.

I hope this helped :D

Some differences between the sympathetic and parasympathetic nervous systems:

Explanation:

- Neurotransmitters: norepinephrine in sympathetic (adrenergic fibers) and acetylcholine in parasympathetic (cholinergic fibers)

-The sympathetic nerves have their origin in the spinal cord (between segments T-1 and L-2) and from there to the paravertebral sympathetic chain, then in tissues and peripheral organs.

- The parasympathetic nerves have their origin in the brain stem, mainly in the cranial nerve nuclei III (oculomotor), VII (facial), IX (glossopharyngeal) and X (vagus) and in the sacral medulla.