Recent content by Puma24

Hey all, I realize a question on this topic has been asked elsewhere, but the links to references they use seem to be dead, so I'll press on! I'm reading some introduction to antenna theory and I've often puzzled on the equation: A_{eff} = \frac{\lambda^2}{4\pi} which relates the effective...

Alright then. So if we had the power to observe the material, would we see the side I poke move slightly, and then a sort of compression wave propogate through the material (like you could imagine a sound wave compressing air), warping the dimensions as it goes? Do you know if the speed of this...

If I were to have some material, that was rigid, and was also say, 300,000,000 metres long. If I were to poke it at one end, would another observer see an instantaneous response at the other end? Ie, would the information I put into one end of the material travel faster than the speed of light...

I understand that there are 4 forces: Gravity, Electromagnetic and the two nuclear ones. So, which one is responsible for the force that pushes air (for example) into a vacuum? Am I correct in assuming its electromagnetic? Like... there is some sort of electromagnetic potential between the...

Homework Statement I've been given some Bench Notes for a Physics experiment I am supposed to be writing a report up for. What the notes show is a graph of logp (log of resistivity) and logn (log of number density of charge carriers) for given N and P type semiconductors. What is clearly...

Hey! So, as I understand, kinetic energy of a moving object is proportional to its velocity squared. So I'm wondering where these inconsistencies come from, and how they are resolved: So, say two objects of mass M are travelling, with reference to a stationary observer, one in the left...

Hey all, I woke up this morning to find my newly installed skylight was leaking water through it; only one drop at a time thankfully. I placed a glass underneath it to catch the water, of quite a small diameter in comparison to the skylight (about a third the size), and then sat up...