# All Questions

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### How can KVL & KCL be derived from Maxwell equation?

How can KVL & KCL be derived from Maxwell equation in integrated circuit ??
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### Find Angular Momentum about any point

How do I find the angular momentum of a body about any point? We know that $L=I\omega$ for a body rotating in space, where $L$ denotes the angular momentum, $I$ denotes the moment of inertia and ...
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### Object that causes space time to rise?

Is there any thing that will cause space time to rise, so that particles are pushed away from them rather than pulled towards it. I know things such as Black holes and planets causes dips and curve in ...
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### Local degrees of freedom in QUGRA lead to black holes

I am reading Jan Boer's review of the AdS/CFT correspondence and I quote from end of page 1, where he is talking about equivalence of (d+1)-dim gravity to d-dim field theory “If true, it implies ...
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### Find the minimum value of velocity

Find the minimum value of the initial velocity $u$ of the particle such that the particle crosses the wheel of radius $R$. Details and assumptions $R=2m$ $g=9.8m/s^2$ Neglect air resistance. All ...
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### Quantum computing records

I'd like to gather answers pertaining to the current records for quantum computing. 1) What is the current record number of entagled qubits (has it surpassed 14 http://arxiv.org/pdf/1009.6126.pdf)? ...
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### How would the data be different in a RC circuit? [on hold]

how will the data be different if the resistance is doubled in the circuit. how would the slope of a linearized graph of In(V) versus t be different? How will it be different if the capacitance is ...
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### How to find the extension of a spring

I have this question and I have done some work on it, but i feel there is something wrong about my answer. You have a particle hold on a ceiling by a spring with elastic constant "k" and the length ...
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### From representations to field theories

The one-particle states as well as the fields in quantum field theory are regarded as representations of Poincare group, e.g. scalar, spinor, and vector representations. Is there any systematical ...
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### Why are free electrons free?

This is what I understand so far: in a conductor, the ions have a weak pull on the valence electrons. So when an electric field is applied, the free electrons are able to easily move about. Makes ...
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### In what sense is the renormalization group equation a group?

The renormalization group equation is given by: \left[\mu \frac{\partial}{\partial \mu} + \beta \frac{\partial}{\partial g} + m \gamma_{m^2} \frac{\partial}{\partial m} - n \gamma_d ...
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### Do free electrons really not interact with photons?

If free electrons don't interact with photons, why are free electrons accelerated by electromagnetic fields?
Consider the following question. My calculation is as follows. \begin{align*} P_C = P_A + \rho g h\\ P_A = P_C - \rho g h \end{align*} Because $P_C=P_0=\rho g h$ then $P_A=0$. Is it correct that ...