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d_b

Los Angeles, CA, United States

A lapsed physicist.

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75
Why is there a need for the concept of energy if we have the concept of momentum?
physics.stackexchange.com

34
Why does the vacuum even have permeability and permittivity?
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23
Idea of Covering Group
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22
Is the magnetic vector potential "real" in classical electromagnetism?
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21
Why is quantum gravity non-renormalizable?
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20
Why is the centre of mass of a semicircular wire outside the body?
physics.stackexchange.com

17
Why does the bar in the gym not fall when one side is loaded with weight?
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16
Why does charge accumulate at points?
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15
What is the physical importance of topological quantum field theory?
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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
Is resonance a general property of second-order differential equations?
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11
How entangled are the $|W\rangle$ and the $|GHZ\rangle$ states?
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11
When assembling a ball of charge, why do we need less energy to assemble a bigger ball?
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11
Is it correct to say "My teacher yesterday was in Beijing."?
ell.stackexchange.com

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
Why is the ground warm during winter and vice-versa?
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9
How does potential energy increase with no work?
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8
How can the electric and magnetic fields be non-zero in the absence of sources?
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8
Why does Norton's thought experiment require a specific dome shape?
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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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7
How does Hookes' law predict that a guitar string's frequency is inversely proportional to its length?
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6
Is it "beat three men off" or "beat off three men"?
ell.stackexchange.com

6
What did Feynman say about cesium chloride and body-centered cubic structure?
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6
Is a bra-ket always a scalar?
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6
Is $V_\text{RMS}$ an unfortunate abuse of operator?
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