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Plasma is a state of matter which is composed entirely of charged particles or ions. By this definition, a flame is a plasma in itself because it consists of charged particles which can be demonstrated by placing a flame in a uniform electric field. The flame bends to a side in presence of a field. It may also be due to the fact that an electric field ...


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I have another perspective on it. Interference is a wave phenomenon which nobody knows why and how it happens. I am just putting my thoughts and see if it answer yours. When a photon reaches slit it needs to decide whether to continue as a photon or convert to a wave. Conditions which are favorable for conversion is wavelength and phase correlation of nearby ...


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Yes you do need the exact velocity when it hits, and the exact velocities when they shoot off. Theres a fair bit of friction involved, therefore it can be tricky to calculate the velocity. Also momentum is conserved along a direction. Did you take that into account?


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This is not altogether correct. In particular, it does not matter what the pressure of the room is (unless you reach extreme values), because actually what is holding the water column is not some "high" value of the pressure at the bottom of it, it is the fact that the pressure at the top of the water column (at the water-finger interface, or in the air ...


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Weight of water is too more to get hold from bottom just by h$\rho$g pressure but actually when you put thumb you cutoff above pressure and then the pressure at bottom then dominates and hold water in straw.You can find the force now using formula above and it will be right to say that the force just due to pressure on bottom surface is $1.01325*10^5*\pi ...


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Yes, what you have formulated is fine. The pressure acting on the water from the bottom of the straw will be equal to the weight of the water times the cross section area. So $101325\pi r^2$ is the force acting from below also. That is precisely why there is an equilibrium and the water is not falling.


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The easiest way to determine the uniformity of your slabs of wood is to take an x-ray. Seriously. This image is of an x-ray of a piece of wood where the dark regions are cavities created by termites eating away at it (the termites are the white things inside the cavities). If you don't want to take an x-ray (or can't afford one), then just assume that ...


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Since Community in its wisdom brought this up again, lets make things clear: 1.Suppose if we have the planning of home to be made in the same manner of the circle shaped fibre with same material as that of quartz. We can have same light circulating all over once incident. So, if this happens we can have light through out the house with out light being ...



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