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All Answers by Paul Brindza

How many atoms are in the human head?

If different types of quarks have different masses, then why are protons and neutrons said to have the same mass, when they have different compositions of quarks?

If there is no way in the world to see an atom, then how do we know that the atom is made of protons, electrons, neutrons, the nucleus and the electron cloud?

Does baking soda lower water temperature? If so, why?

Someone told me that Cherenkov radiation is analogous to breaking the sound barrier. In the latter, an object travels faster than the speed of sound...

I am creating an electromagnet for my school's science fair project. Does the shape of the iron core make a difference?

Who invented magnets?