particle theory of light
If light is a particle then it should definitely make sonic booms.but i did not find them even by keeping my er on light.ok light value is high but even if these guys did mistake in calculations then...
View ArticleSpatial Reasoning behind the Maxwell-Boltzman distribution: A Question
I have been trying to figure out if, and if so, just how is the shape of the molecules in a gas is taken into account by the Maxwell-Boltzman distribution. I know the assumption is perfect spheres, but...
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Centrifugal forces + pressure and CG
Take half torus with solid part of density 1, other half torus with liquid of density 1. The torus turn at W rd/s enough for maintain liquid at external circle. Now, for 0 to 180° we accelerate torus,...
View ArticleExpansivity against temperature graph
β = 1/T from the equation, T increase ,β should decrease. But refer to graph, http://www.sciencedirect.com/science...25540809001081 Why β increase as temperature increase? thank you.
View ArticleRelationship of the Demagnetizing Energy to the Demagnetizing Field
Hello, I'm currently reading material on micromagnetics. In these papers, authors define a quantity called the demagnetizing energy ([itex]E_d[/itex]) as [tex] E_d = -\frac{1}{2} \int_V \vec{m} \cdot...
View Articlereflection grating
hi, I am bothered by some question for a long time. From basic optics, i know that the the angle of incidence equals the angle of reflection [where we define the incident angle as the angle between the...
View Articledoes standing on bathroom scale depress or compress spring
I am unsure how bathroom scales work. Does your weight compress or depress the spring? Do scales measure the upward or downward force? Please explain in detail.
View ArticleHow to get critical temperature from experiment?
Besides plotting P-V graphs,then see the graph shape. Do we have any other way to get the value of critical temperature of a substance? Thank you.
View Articlevan der Waals gas is not real gas?
From van der Waals , (P+a/v^2)(v-b)=RT, At critical temperature, I get (∂P/∂V)at constant temperature =0 and (∂^2P/∂V^2) at constant temperature ,T=0. then critical pressure,P = a/(27b^2)--------1...
View ArticleHelp understanding thermodynamics/BTUs
I am trying to design a heating element to heat a greenhouse. I found a very accurate calculator that helped me find the BTU/hr I need to heat this area to my desired night time max temp, that figure...
View ArticleAproximating a morse potential using a taylor polynomial
I am not going to post my question because I want to find out how to actually use the taylor polynomial and morse potential and then apply that to my problem. Say I have to approximate the morse...
View Articlevalue of reduced temperature equal to that of reduced pressure?
I only know that a pure gas at same reduced temperature and reduced pressure will have same compressibility factor. But I wondered is this correct? value of reduced temperature equal to that of reduced...
View Articleclassical physics vs quantum physics
Why do we say that classical physics is a lot different from quantum physics? The laws that determine the macroscopic world should be derivable from quantum laws. So in a way the Newtonian or classical...
View Articlequestion about Ampere's law in vacuum and in matter
Hi We can derive equation [itex]\nabla.D=\rho_f[/itex] from equation [itex]\nabla.E=\rho/\epsilon_0[/itex]. But what about Ampere's law? I tried to derive...
View ArticleWork done by a spring & its potential energy
According to work - mechanical energy theorem , W = K(final) - K(initial) + U(final) - U(initial) . . . . (1) as we define Potential energy as negative of work done by conservative force and assuming...
View ArticleDefinition of first law of thermodynamics
The total work is the same in all adiabatic processes between any two equilibrium states having the same kinetic and potential energy. That is another way to describe first law of thermodynamics , and...
View ArticleWork done for irreversible process
For reversible, work done =∫P dV Then for irreversible ,we can't use the above equation, because we have to consider the dissipative work. Correct? Thank you
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Optics Problem - Maximum Dipole Emission
I am stuck with considering a problem. I don't even really know where to start so any pointers would be a great help. I am considering a semi-analytic model for some data i have. The situation is...
View ArticleJoule's Apparatus and Kinetic Energy
In my textbook, Joule's apparatus (two blocks falling from height h turn a paddle that stirs and increases the internal energy of water) is claimed to convert the potential energy of the two blocks...
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