Why the core spin faster than the manlte
This is more of a question. I don't have a background in physics as you might notice. I am looking for a little help. Why the core spins faster than the crust? At a point the earth’s rotation was much...
View ArticleMatter and anti/matter after big bang
Hello all . Why mater victory to anti/matter after big bang ? There is any relation to gravity ?
View ArticleHow do I calculate the illuminated spot on specimen in optical microscope?
Hi, When we use an optical microscope, how do we roughly calculate the illuminated spot size on the sample ? Also what is the light power on that spot? And what if I change to fluorescence...
View ArticleIm so confused about electromagnetic induction. Need help please?
I first thought that electromagnetic induction disobeyed the law of conservation of energy since there is another current created by another current by changing it (AC). but then there is Lenz law that...
View Article3-body problem
Hello, I am currently studying the 3-body problem and I am struggling to find some examples of exercises or resolved examples. Can anyone point me to a good book or resource I can download? I found a...
View ArticleWhat is magnetic potential energy?
We know that a Magnetic field does no work. Then how does an inductor store energy (1/2 LI2)? When that stored energy is needed, it can be retrieved back and clearly it can be used to do some work. In...
View ArticleOrigin of IR radiation in living things ?
Hi, I've been reading that in a relatively normal environment about 1/2 of human heat loss is due to radiation. Most of this seems to have a wavelength of 10-12 μm. Could someone here speak to the...
View Articlewill the current in the wire attract each other
I wonder whether the current in a single wire will attract each other? Eventually shrink to a line?
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Phenomenon of Light Refraction
I have read about effect of refraction due to slowing of light rays reaching the denser medium first and so light bends etc...but why can't light go as shown in the figure (attachment)? In the diagram...
View ArticleMy thought experiment on determining the moment of inertia of an irregular...
Hello everyone, (This might be a little long winded but I would very much appreciate some help on this!) Today while in psychology class, I was thinking about a much more important subject, namely a...
View Articleperfectly elastic collision of spheres
Hey guys! I am currently developing a simulation that involves sphere (or if you like particle) collision in 3D space. And I want it to be accurate (on the level of classic mechanics). The algorithm to...
View ArticleResistance between parallel wires in an insulator?
Hi all, New here...I was wondering if anyone knows a formula to calculate the (insulation) resistance between two parallel conductors buried in an insulator. For example say 2 copper pins of 1mm...
View ArticleRelationship between Latent Heat of Fusion and Temperature
Does latent heat of fusion typically go up or down with temperature? I'm trying to calculate the amount of pressure needed to move the melting point of Thorium Dioxide up by 444 degrees kelvin using...
View ArticleInduced charge in conductor
Say you had a rectangular piece of conductor perfectly balanced on a central pivot point. Around it, you put something that causes an electric field throughout the region. On one end of the balanced...
View ArticleCan we transfer the charge on a plate of a capacitor elsewhere?
I know it is hard , but can we transfer the charge on a capacitor plate elsewhere? For example if i had a capacitor with capacitance of 56 μF and charged at 200 volts , if i wanted to transfer the...
View Articlej.d.jackson electrodynamics problem
could somebody suggest how the author is arriving at the result y=a(1+1/2(q/Q)^1/2) the point of zero force at page 61 section 2.3 right after equn 2.9 ,in detail.j.d. jackson is not a part of my...
View ArticleNewtonian vs Einsteinian gravity in everday life?
Let me begin by saying I'm not a student of any kind of physics, I just have a general curiosity about the forces at work in the universe, so for most of the people reading this, my question will...
View Articlestanding waves on arbitrary membrane
My (probably misguided) intuition says the following : 'Take a closed loop of wire and bend it into any arbitrary shape so that it lies flat on a table. stretch a membrane over it (i.e. a soap membrane...
View ArticleDefinition of potential energy
Why is change in potential energy is defined as PE1 - PE0 = -W I mean I could see it for example for gravity if we took PE0 to be zero at ground and we integerated -mgy(y^) we get -mg(y0 - y1) ->...
View ArticleHow do I test for UV light in colored LEDs?
I recently purchased two strings of RGB LED lights, the kind you can set to all sorts of colors by combining red, green and blue in various amounts. Unfortunately, I strongly suspect that the blue and...
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