Recent content by p.tryon

Does the fact that a car burns fuel to keep it moving mean that we can truly say that the car is moving and not the earth? If so does this disprove the 1st postulate that maintains ALL uniform motion is relative? *I know that objects in space don't require fuel to move at a constant speed...

How far do you need to separate two opposite 1C charges inorder for the potential difference to be 1v?

Thanks. I have tried it but no luck so far... :-)

I recall a physics teacher demonstrating an experiment where he transferred a droplet of oil to the surface of water and carried out some calculations to determine the radius of a carbon atom. I was hoping to replicate the experiement- However I forget the details. Has anyone seen this...

Hello! Wow I see thank you! That makes sense

Thanks for your reply. Why does it depend on the square of the number of protons? Doesn't that contradict the equation below? P.E. = kq1q2/r

This is a question from a chem textbook but it seems relevant to electrodynamics/quantum mechanics. The energy to ionize a hydrogen atom in its ground state is given by: En = -Rhc / n2 Ei = Rhc (because the electron is being taken to infinity) = 1312kJ/mol The book claims that to ionize...

Thanks for that ;-)

In an electrical circuit the electrons kinetic energy is transferred to other forms of energy at the components. True or false? If it is false what type of energy do the electrons transfer? Thanks

If the energy of an EM wave = h x f and when a light emitting body (of a particular power) is moving toward or away from the observer the observed frequency changes, does the energy change? If so where does the gained or lost energy come from?

Hey! A friend of mine is short sighted. She told me that when she looks in a mirror, objects that are reflected from a distance appear blurred in exactly the same way they do as when she looks at them directly (from the same distance). She also told me that objects that are near but small are...

If we talk use the example of photons (visible reigion) instead of electrons (since both behave as waves) we would observe a shift towards the red end of the spectrum- the doppler shift. So this leads to another question; is the energy of red-shifted light lower than it would be (if observed at...

Hey thanks for the replies

Hello That wasn't what I said... my question was- would the motion of the whole spacecraft actually appear to slow down? (sorry if this was unclear)

As a spaceship approaches the speed of light time itself slows down for everyone and everything on the spaceship: What would this look like from the earth? If time is slowing down for the spaceship would the spaceship appear to slow down as it approaches the speed of light?