Constantine Black

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What makes an orbit stable or unstable?

May 13, 2015

How does the heat of Sun come on Earth when there is no medium?

Jun 13, 2015

Transition probability derivation: How to prove $\lim_{\alpha\rightarrow\infty} \frac{\sin^2\alpha x}{\alpha x^2} ~=~\pi\delta(x)$?

Feb 27, 2016

How to show invariance using the Maxwell tensor?

May 18, 2016

What is behind the definitions of work and energy?

Aug 31, 2016

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Spin commutation relations

May 14, 2015

About the factorial N! in the partition function

Jun 13, 2015

Einstein model for thermal capacity of solids and indistinguishability of the oscillators

Jun 13, 2015

Entropy: Disorder or energy dispersal?

Apr 16, 2015

On the expansion of space on small distances

May 28, 2016

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