If positive charges and negative charges attract while negative charges repel each other, then why don’t the positive protons within an atom repel?

They do, it is just that the strong nuclear force, a force different from the electromagnetic force you are referencing, is much stronger and overwhelms the repulsion. It only acts when things are very close, as the internal distances of the nuclei of an atom, but it is incredibly strong. The electromagnetic force acts over … Read more

What factors determine the selection of methods of the separation of a mixture?

When approaching a separation problem, the first order of business is to identify what is different between the molecules (or ions) that you wish to separate. For example, if all of the molecules are hydrophobic but differ in the magnitude of their hydrophobicity, then a separation method based on hydrophobic interaction is a good choice. … Read more

What is the top five things that attracts girls?

The top five things that attracts girls   Be a good talker This doesn’t mean you need to talk a lot. It means that you need to talk smart. Your words are very powerful at attracting girls, more than physical appearance. Be mysterious The mystery is something that attracts everyone and it surely attracts girls … Read more

How likely is it that the concept of the ‘Goldilocks Zone’ will yield a habitable planet with a breathable atmosphere?

Our Sun is a very ‘quiet’ star. For its size, it doesn’t produce a lot of damaging radiation. The amount of UV light it puts out is NOW countered by our atmosphere as Oxygen has produced Ozone which absorbs a lot of UVc. This Oxygen was initially produced by cyanobacteria in early development of the … Read more