Recent content by Sigma Rho

The question says just one! Thanks for the answers guys, most helpful.

"completely stable nucleus" question The nucleus of a helium isotope contains 2 protons. I have just worked out the magnitudes of the electrostatic force and the gravitational attraction between the 2 protons. The question now reads "the nucleus is completely stable. Considering the...

What information does this law give us? This seems to be a different question to "what does this law mean?", which I could answer with "it describes the electrostatic force between two charges q1 and q2 separated by a distance r, the magnitude is inversely proportional to the square of the...

An apparently easy question that has got me baffled! The question is simply "What is the difference between the potential of a body and the potential energy of a body, and why is it sometimes more useful to consider the potential rather than the potential energy?". I know the answers (I...

Hi all, I have a few questions that I'd appreciate some guidance on. There are two identical dust particles:- mass 13ug charge +9.8E-15 C electrostatic potential energy 8.7E-17 J gravitational potential energy 1.1E-24 J The mass is given in the question, the energies I calculated...

s'okay, I've just worked it out. It was embarassingly simple!

Here's my problem:- A horizontal tube has a T-junction with a vertical tube coming downwards into a container of liquid, at height h below the T-junction. Air is forced into the horizontal tube which causes a pressure difference which sucks the liquid up the vertical tube. What is the...