Physics

I've always been extremely skeptical of the Copenhagen interpretation. I'm aware of its use in explaining the probability distribution of subatomic particles, but the extent to which the idea has been taken, simply seems unrealistic. I'd very much like to see a mathematical/scientific proof of some kind which more adequately affirms/debunks the veracity of this interpretation.

Hello. I have an obscure question... I understand that electromagnetic energy spectrum includes everything from Gamma Rays to Radio waves, with x-rays, light and microwaves somewhere in between. I also understand that fire releases energy. Much of this energy is heat, and some of it is light. In addition to light, what other forms of electromagnetic energy does a fire release? Does a fire also emit ultra-violet radiation or infrared radiation? What about X rays and Microwaves? Or even radio wave interference? And what would the distribution of this energy look like on a graph? I have attached an image of what I think it might look like, but I am pro…

how many watts is deadly to a human?

Ok, im a starwars fanatic, and as i was playing a game, i notised that the players could apply a shield field and be protected from bullets:eyebrow:. Now i have been doing some research on it and found this fourm, then i search for 'reverce magnet' and found this: Can a magnet be made to PUSH metal? So here i am wondering if you strip pyrolytic carbon to about 2 mm, would it lose any force from the orginal, i don't know, 1 sq. dm block, and, would it have the power to stop a bullet before it hit you? Thanks, -Iruka

Hi can anybody help me with my egg launcher project? I can't really decide what to build. We're suppose to build a egg launcher taht willl launch 20 meters, and it won't break the egg. In my mind i had the trebuchet in mind or something like that but I have no idea how to build a working model. Any other egg launching device you can suggest? Thanks a bunch

As I understand entropy and the Second Law of Thermodynamics, things stand as follows: A closed system has a set Mi of possible microstates between which it randomly changes. The set Mi of all possible microstates is partitioned into macrostates, resulting in a partition Ma of Mi. The members of Ma are pairwise disjoint subsets of Mi, and their union is Mi. The entropy S(ma) of a macrostate ma in Ma is the logarithm of the probability P(ma) of ma happening, which is in turn the sum Sum_{mi ∊ ma}p(mi) of the probabilities p(mi) of all microstates mi in ma. The entropy s_{Ma}(mi) of a microstate mi with respect to Ma is the probability of the macrostate in Ma to which …

Please see the attached "concept" pdf file. If the mechanism does not generate energy then there should be physics which can clearly show that without it being assumed in the method of analysis used. Included in the analysis should be clearly shown details of a torque opposing the rod's rotation since the absence of such a torque would mean that the mechanism continues to operate indefinitely and in doing so continues to power the motion of m2 indefinitely. If it does produce energy then energy is not conserved. More could be said about this interesting mechanism e.g. acceleration of m1 in the x direction without a force being applied to it in that direction, the for…

When a dicussion about Time begins, it usually derails into philosophical blah blah after a post or 2. I'd like to refrain from the philosophical tentation, and try to concentrate on what we really know about Time from a scientific point of vue only. For example: 1. we know that motion requires time: nothing can move from one spatial coordinate to another in zero time, it would be a transgression of the Speed Of Light. 2. we know that the rate of time is related to gravity: where gravity is stronger Time flows slower. 3. we know that time has a "direction", commonly called the arrow the time. 4. we know that time is related to causality, and causality…

So I am doing a research paper but im not sure if density affects the bending of light. I have once read a short experiment on the net explaining that density does not affect how much light would bend. http://www.usc.edu/CSSF/History/2007/Projects/J1605.pdf Well, im doing an experiment on the refraction of light and it seems that density doesnt affect the refractive index of the substance. This is the information i got from the web. (i computed for the change in the speed of light by using 1/(refractive index) = change in the speed of light. 68.03% means the speed is 68.03% of the normal speed of light. --------------refractive index-------change in speed--------…

I have always wondered why the energy of a photon in vacuum is equal to E = pc (where p is the momentum of the photon, and c is the speed of light in vacuum) and not E = 1/2 pv (where for a photon v = c) as is the case for the kinetic energy of any moving mass. Of course, I understand that photons are massless, but can anyone clearly explain how E = mc^2 and not E = 1/2 mc^2 and prove that in a theoretical non-empirical way??

How would one go about removing a magnet from a hole in something? My problem is that I got a small ball magnet stuck in a screwdriver hole, fitted for an alan wrench, and cannot remove it. Any help would be much appreciated.

Having just recently signed up as a member of SFN, a friend has asked that I post the following document relating to molten metal at WTC 1, 2 & 7. The PDF link... http://www.journalof911studies.com/volume/200704/ProfMorroneOnMeltingWTCsteel.pdf Can I ask people to give there thoughts on the accuracy of this document written by Professor Terry Morrone. This seems like the best place for people to look at this through the impartial objective lens of science.

what if it is true???

I didn't know which category this fitted in, but you got the duty: When it’s hot. They say, “wear a hat”. To keep the heat off (No, not just the UV). When it’s cold, they say, “wear a hat”. “30% of your body heat is ‘lost’ via your head…” Isn’t this crazy talk? Your hot blooded brain isn’t going to conserve body heat because it’s got a hat on it? Isn’t putting a hat on, in summer, going to make you hotter? Given the above? My idea is that ‘hat’s have no net-effect at all except in extreme, extreme. Circumstances. Can a hat, at any time (not counting a blizzard), do any good?

ok first sorry if ithis is in the wrong section but my question is if you take two permanent magnets (in this case its the "rare earth" type) and stick them together does their magnetic field double? or is it like 1.5 times as strong or is it exponential

In 340 b.c., Greek philosopher Heraclides proposed, that our planet spins. The idea was dismissed for nearly 2,000 years, on the grounds, that "If Earth rotated [then] a person jumping up would land in a different spot" (Astronomy 2010). Two millennia were lost, to ridicule, being allowed to trump sound-and-sane science (cp. 'delay is death' -- Czar Peter I). The concept of "relative motion" could easily have been demonstrated, cp. Hypatia, head of the Library of Alexandria, in the docu-drama Agora.

How many joules of energy is needed to go 99% the speed of light?

What is the difference between high frequency signals and low frequency signals in terms of the distance that can be travelled by the signal, the power required to transmit the signal (for a certain distance), and susceptability to interference (EMI)? Thanks!

Hi everyone, I am new here, but I have a question I have been thinking about a lot. The force of gravity is one of the fundemental forces in nature. But my main question is, what actually generates the force itself? Now I know of course that gravity is proportional to the mass of an object, but that must mean that every atom on it's own, generates a very tiny amount of gravitational force - right? So is it the nucleus, electrons, quarks, the charge of the atom or something entirely different that actually generates the force? All the research I have been able to find about gravity, never really covers the subject of the force itself, but rather more it's eff…

What does 'emergent' mean to you in a physics context, such as spacetime?

Sorry if this is in the wrong section, I am new to the forum. My question is about magnets. I am looking at a few, pull force is about 40 lbs. What does this mean, and how does that relate to the repulsive force? Is there and equation to find out how much two magnets (40 lb pull force) will repel at different distances? Thank you.

I'm looking for a material to place my laptop on while its on my lap as it gets hot. What material will best prevent the heat? I had aluminium in mind.... Thanks

This doubt arised in me just when i was holidaying with my parents in the car. A huge load in the trunk made the car to move slow. this means, mass is inversely proprotional to velocity. But then i suddenly thought of einstein's theory. What he said was that ,when an object acquires the speed of light, its mass becomes infinite. Doesn't it mean that mass is directly proportional to velocity. Can anyone pls clear it to me in a liberal way as i am only a school student and cant understand complex terms...

Hi everyone, I've come accross this on the bitesize revision pages and it doesn't make sense to me, I was hoping someone would be able to explain it, the link is : http://www.bbc.co.uk/school... my problem with is is that the formula for working out the relationship between the voltages on a transformer and the number of turns on a coil is that they seem to change the formula round. First of all it is: Vp/Vs = Np/Ns then they write it as: Vs/Vp = Ns/Np which obviously isn't the same thing unless I'm missing something! They then add in a multiplication when there isn't even one in the formula!!! This is what the question is: "A transformer h…

Recently I have made two test to see how much hydrogen is made with hot and with cold water and I have seen that when you put an electrolyser into hot water, the quantity of hydrogen obtained and the speed of electrolysis is higher that when you do the same test in cold water. What is the main explanation to this?