Recent content by Freddy86

Hi, I'm trying to figure out what phase differences take place with an ideal transformer. This is what I have figured out so far: If you apply an AC current to the primary coil then you will get an alternating flux in the primary and secondary coils simultaneously therefore the fluxes are in...

Try not to picture Earth on the top of a sheet as this is merely a 2-D analogy of a 4-D phenomenon and can serve to create confusion. I tend to agree with phinds on Kaku, he often imposes his very abstract thinking on his audience, most of which stems from his extreme interpretations of string...

Hi, please could someone help clarify the reason why a mechanical wave is inverted at a boundary as I'm really stuck! Some sources I have read seem to suggest it can be explained by Newton's 3rd law whilst others suggest its to do with conservation of momentum. Newton's 3rd law - consider...

Thanks for your answers. If real higgs bosons decay really quickly then there would be none around today but how could they predict a particle that isn't around anymore? I understand the importance of the field but what relationship does the higgs boson have to the field as there seems to be a...

Hi, please could someone kindly answer a few questions regarding the higgs boson. Everywhere I read about this topic I seem constantly faced with information that is not consistent. I have focused on sources (mainly YouTube videos) of well known physicists and other Physics Forum threads in an...

Thanks for your reply. So I just found a really good video about magnetism in an atom () which says there is a contribution from the angular momentum about the nucleus (although it usually cancels out) and an intrinsic angular momentum (spin). So when people talk about the magnetism that comes...

Hi, please could someone provide me with an explanation of the differences between the magnetic quantum number and the spin. I thought that the magnetism of an electron/fermion comes from its intrinsic quantum angular momentum (i.e. its quantum spin) which was evidenced by the Stern–Gerlach...

Thanks. So is it not correct to say that fermions do not look the same after one revolution? I'm a bit confused now as it states in one of Hawking's books (brief history of time) that fermions do not look the same after being rotated through 360 degrees. Or is just that the notion of "look the...

Hi, please could someone explain the notion that particles of 1/2 integer spin do not look the same when turned through 360 degrees. This notion seems to crop up when I read around QM but nobody seems to explain how this came about. So my question is this - what experiment shows/confirms that...

Hi, apparently you can calculate the amount of energy the sun delivers to each square meter of the Earth using an umbrella, tin can, water and a thermometer. You put the tin can outside with some water in it and put the umbrella over it until it reaches ambient temperature. You then take the...

Thank you tiny-tim that makes a lot more sense. In terms of flux cutting in a loop, how do you explain the experiment where you swipe a wire in between two bar magnets to generate a current? Most websites seems to imply that it is the number of field lines the wire cuts through but as you...

Thank you for your answer. When you do that experiment where you move a wire through a magnetic field and 'cut' the flux lines then you are only concerned with the wire cutting the magnetic field lines. However, it seems that when one is dealing with a loop of wire and a changing magnetic field...

Hi, please could someone help explain how magnetic flux works in Faraday's law as I struggle with electromagnetism. From what I understand, if you have a loop of wire in a magnetic field then you get an induced current if the flux is both changing and perpendicular to the plane of the loop...

Thanks for the replies. So if you submerge an object in a jug of water then the pressure will be radially inwards on this object right? Is this because the walls of the jug are considered to be at greater pressure than the fluid then? No I meant that if a diver went down too deep they get a...

Hydrostatic pressure is exerted in all directions but what determines whether it acts radially inwards or radially outwards. For example, if you are a diver you feel pressure from the water acting inwards, giving you a crushing sensation. However, if you fill a balloon full of water and poke...