Physics

what is the relation between the magnet we know [ N | W ] and the inner core of the earth, is it some kind of a special massive magnet, or it works with different mechanism ..?

Hi, Wondering why in the formula K = 1/2 m v (squared) for kinetic energy, there is a half.

The equation F A Q1 Q2 r2 Where A is a constant, Q1 and Q2 are the charges and r is the seperation of the charges. Please can any one offer some assistance in making A the subject of the equation? And to find the units of A

hi, Was wondering why velocity is squared in motion formulas - such as in - v = squared root of v (squared)x + v (squared)y as in projectile motion and other formulas of motion which have the variable v squared or the subject v squared. Is it do with accounting for resistance, which is like proportional (somehow) to the speed of the object or something...

I know this is crazy, but what if ... I created an electron gun that charge high amount of electrons, then it discharge them in stream of connected packets of electrons ... electron: O electrical transcriber: |XXXX| ------------------------------------------------------ :::::::=========] [gun] OOOOOOOOOOOOOOOOOOOOOOOOOOO |XXXX| :::::::=========] ------------------------------------------------------ i once read that the American scientist Tesla tried to transmit electricity through air ... any ideas ..?

I am kind of puzzled about whether the earth magnetic force is related to gravity.Ok both forces pulls towards the center of the earth, but still... Thanx!

Hello everyone, This a question related to ATP pump that uses electrochemical gradient to provide energy to make ATP. I have few questions about this. 1. In an electrochemical gradient there are more positively charged ions on one side of the membrane(In proton gradient case). So why do the protons move from highly concentrated area to low concentrated area? Is it because the side that has more protons repel each other and eventually push the protons away until the charge is neutralized? 2. If there is a higher concentration of ions in one area why do they move to the less concentrated area? Is it because higher concentrated area has higher pressure so they move …

Hello everyone, Why do looking at things with one eye closed through a small hole like microscope make the object look clearer. Someone told me it gives less abberation. Then I checked it online and it said different wavelengths converge at different points in a lens. Ok I understand why that would create a blurred image, but I don't understand why looking at objects as the way I describe create less abberation. Thanks

In recent years biology and chemistry have progressed tremendously through genetics and neuroscience. It seems to me that physics is at a stand still and has been for a long time. Is this because biology and chemistry occur at a level of reality or scale of reality that is always within our perception, but physics has already reached the outer edge of what we can experience or perceive? If our instruments and our minds are always limited in relation to the reality that they grew from, then our understanding of physics will always be limited as well. It seems to me that the questions we will never be able to answer include: What is the smallest constituen…

Hello everyone, I know the pressure at bottom of atmosphere is higher than above. Then when I suddenly heat up air at the bottom of atmosphere why does it rise? Ok if it is buoyancy, why doesn't the air at the top fall down towards earth, because they are less dense so they must fall right? I can understand how a small leaf can float in air but how can the medium itself float up? Thanks

Hello everyone, I'm bit confused about buoyancy. First of all I want to know if it is newton's third law, filling a vaccum or none of above. For example these are my 3 diffferent understandings of what buoyancy could be. Which one is right I fall on water and diplace water molecules, do the water molecules give a reaction force back on me calling buoyancy. If that is the case why is it not Newton's third law. when I displace water molecules, water molecules from underneath come to fill the vaccum and push me up(especially when you displace air isn't this what happens). Is this buoyacny? Thanks

Hello guys, This is simple question but I have gone completely blank. Ok let's say there was a balloon outside that was inflated. This means that it has expandes so it's pressure is equivalent to atmpospheric pressure right? So when I pinch it why does air escape, how does balloon suddenly have higher pressure to make air move out? Is pinching the balloon equivalent to making the volume of the ballon smaller. Thanks

Hello everyone, I'm not studying about light so this question is just for interest. I know light is an electromagnetic wave. So this is my understanding of light. If there is a positive and negative charge, an electric field is created between them. If the charges oscillate this electric field oscillate and you get light if the wavelength is right. I don't know if this is wrong. My questions are 1. If electrons in the sun oscillate and produce light, what is the electric field in this situation? Between the electrons of the sun and the protons of the earth? Can't it interact with so many charges on its journey. 2. If photons are released with light do they travel…

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

I'm not quite sure if I am posting this question in the right forums due to the inclusion of this subject into several different fields: I recently watched a program on either the Science channel or NatGeo that was about lightning. It stated that lightning was not produced solely by the cloud of it's origin but by the combination of the cloud's charged fields and a gamma ray burst coming from space in the form of a cosmic ray. Atleast I'm pretty sure that is what I heard. They said that the cloud itself does not have the required charge to create the initial voltage for the strike, that the gamma rays end up exciting the electrical charges to the point of creating the…

If one were to harness the backward nature of antiphotons, such that: -(E) = -(m)(c^2) => -m = -(E)/(c^2) Would one create an anti black hole if one were to bestow this energy upon mass? An anti black hole either propelling mass away from itself, or crushing things into a singularity before they get close to it. Or both...

Ok so when I pass electricty through salt water the negative ions move from highly negative area to positive area causing a current? My question is why do the move? Let's say there was Sodium and Chloride ions in water. Can't the chloride ion give an electron to sodium and make the whole solution deionized, why do they choose to move instead? Thank you

how is the assumption zero rest mass accepted for photon?and not for an e-!! both are particles they have relative masses during motion and also both have energy during motion. while e- rest mass is not zero!photon's mass is zero. we also know set of photons can be converted into particles having rest mass,can we convert a single photon(energy) to mass by bringing into rest? if mass is found then it contradicts the assumption!! it will be a paradox! also the mass of an electron is approximately 9.109×10−31(rest mass) kilogram or 5.489×10−4 atomic mass unit. On the basis of Einstein's principle of mass–energy equivalence, this mass corresponds to a rest energy of 0.5…

Hello everyone, I'm confused about light. I know when a photon with certain matching energy comes, it excites the electrons to a higher orbital, and releases a photon when it comes back. 1. What happens to the orginal photon that lost energy? 2. I then read about absorption and reflection, then they were talking about resonance. I don't understand how what I described above with photons apply to reflection and absorption. Can anyone explain me to me with photon theory what happens in absorption and reflection. Thanks

Can someone possibly give me a brief explanation of aerodynamics or give me a link to a good place to find out about it. yes i do know calculus so a mathematical explanation would be fine. thanks

Neutrinos are extremely difficult to catch because they interact extremely weakly with the matter ... but they probably have internal magnetic structure and magnetic moment - so shouldn't they interact a bit with strong EM fields? In accelerators we use magnetic devices focusing beams of charged particles, but maybe there could be constructed analog for particles having only magnetic moment? I know - the first problem could be that their spin direction is random - but there are ways to order it, like Stern-Gerlach experiment (... for low energy) ... ? The other problem is that focal distance of such lens should rather depend on their energy ... but maybe there are way…

Hi, Was wondering if anti-matter is at all associated with supersymmetry...

Hello guys, I just have few questions about this. Now I understand how a standing wave is formed. However I'm unsure what the nodal points are if I pluck an open string. Is it the headstock and the bridge? 1. If each guitar string has harmonics, how does this occur. I read that it can vibrate at many natural frequencies but I don't understand how a string could vibrate at many natural frequencies at once to create harmony? Does this occur at once or is it like one type vibration, and then another type of vibration. 2. Do you need resonance to create standing waves. I'm thinking not because all you need is to pluck the string to create a standing wave. 3…

Hello, I am interested in creating a large magnetic or electromagnetic field (5-10 foot radius). Any suggestions on how I can do this? Is it possible to focus a magnetic or electromagnetic field in a specific direction? Other things to consider is keeping power consumption low. Thanks in advance.

Why does windy weather seem to impact digital TV signals? Since we went to digital signals I have noticed the weather has a big effect on Digital TV signals but I can't explain why wind on a clear night seems negatively effect TV signals?