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HNQ
1:39 AM
1
Q: Apparent paradox in statistical mechanics

RayPalmerI can't understand why the likelihood of a particle to be in state $\epsilon_i$ in a canonical ensemble, does not depend upon the number of particles in that state. The probability that the a single particle is in state $\epsilon_i$ is given by the gibbs/boltzmann probability $p_i=\frac{e^{-\beta...

 
 
2 hours later…
HNQ
3:20 AM
2
Q: What impact does air have on our weight?

bruce maoAlthough air is light, it is fluid. So it must exert upthrust on people. So does it mean, in fact, we are heavier than our weight? Also, the gravitational acceleration is bigger than its value?

 
 
2 hours later…
HNQ
5:25 AM
2
Q: Why doesn't a parallel circuit violate conservation of energy?

neel gLet's imagine a hypothetical circuit where there are a large number of wires placed in parallel to each other, hooked up to a simple power source. We know that voltage at each wire would be equal $V_{total}=V_1=V_2=...=V_n$ where $n$ approaches a large number; and that each wire is of some arbitr...

 
 
8 hours later…
HNQ
1:23 PM
1
Q: 1st Law of Thermodynamics in a Filament

johnFor a filament lamp than is operating normally such that the temperature is constant, the rate of change in internal energy of the system is zero. This would mean that rate of net heat transfer to the system + rate of work done on the system = 0 I can understand why rate of work done on the syste...

 
 
5 hours later…
HNQ
6:00 PM
1
Q: How can we show that the very early universe can be considered to be flat?

Nova FlynnLet me confess that it's a homework problem. I was working on a heuristic proof of the following problem. How can we prove that the very early universe can be considered to be flat. It was asked in my postgraduate course and general theory of relativity is merely introduced. At, present I am str...

 

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