If jason is playing football and jason runs with the football west at a speed of 40.0 m/s and then turns and goes north at 5.0 m/s, what is the resultant velocity and 0?

What is hidden during a lunar eclipse? isn't the moon hidden?

Is it possible to use the energy from two atoms colliding to create a clean burning lasting fuel source with a large amount of force? is it also possible to harness that energy from the two atoms colliding to create a clean energy source that will last for years from just two atoms colliding. is there a possibility to control and store that energy for years but slowly let the energy out enough to power cities cheaper and faster.

Achlorine atom has 17 protons and 18 neutrons. what is its mass number? what is its atomic number?