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d_b

Los Angeles, CA, United States

A lapsed physicist.

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70
Why is there a need for the concept of energy if we have the concept of momentum?
physics.stackexchange.com

33
Why does the vacuum even have permeability and permittivity?
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23
Idea of Covering Group
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20
Why is the centre of mass of a semicircular wire outside the body?
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15
What is the physical importance of topological quantum field theory?
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14
Why is quantum gravity non-renormalizable?
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14
Is this four-step recipe for quantization always valid?
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14
Is the second law of thermodynamics even a law?
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14
Properties of the dot product
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13
Why does charge accumulate at points?
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12
Is resonance a general property of second-order differential equations?
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11
Is it correct to say "My teacher yesterday was in Beijing."?
ell.stackexchange.com

11
When assembling a ball of charge, why do we need less energy to assemble a bigger ball?
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10
How can (in Dirac's terminology) the product of two "real" linear operators be "not real"?
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10
Is the spacetime interval a tensor?
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10
Proof that Vectors Describe Reality Correctly
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9
How does potential energy increase with no work?
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9
Why is the ground warm during winter and vice-versa?
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8
How entangled are the $|W\rangle$ and the $|GHZ\rangle$ states?
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8
Should it be 1.5K instead of 1.5°C?
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7
Basics of photoelectric effect
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6
How is it possible to escape a gravitational body?
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6
Is a bra-ket always a scalar?
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6
What did Feynman say about cesium chloride and body-centered cubic structure?
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6
Is $V_\text{RMS}$ an unfortunate abuse of operator?
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6
How can the electric and magnetic fields be non-zero in the absence of sources?
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6
Is a book fund related to money?
ell.stackexchange.com

5
regarding the infinite cross section in Rutherford scattering
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5
Is Maxwell's field the wave function of the photon?
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5
Why bulk states in quantum hall effect do not contribute to electric conductivity
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