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Physics
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DanielSank's user avatar
DanielSank's user avatar
DanielSank
  • Member for 12 years, 4 months
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214 Answers

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152 votes

What is more fundamental, fields or particles?

112 votes
Accepted

Where is the flaw in this machine that decreases the entropy of a closed system?

109 votes
Accepted

Is the Boltzmann constant really that important?

94 votes
Accepted

Did NIST fudge this news story about absolute zero?

91 votes
Accepted

How strong are Wi-Fi signals?

74 votes
Accepted

Can tin foil hats block anything?

68 votes
Accepted

Are random errors necessarily Gaussian?

45 votes
Accepted

Why is black the best emitter?

38 votes
Accepted

Complex integration by shifting the contour

35 votes
Accepted

If action equals reaction, how is it ever possible to win in martial arts?

31 votes
Accepted

What is the physical interpretation of second quantization?

31 votes
Accepted

Why are band maxima / minima often (always?) at high-symmetry points?

30 votes
Accepted

Can the "Three Polarizer Paradox" be explained classically?

27 votes
Accepted

Why is the partition function divided by $(h^{3N} N!)$?

27 votes

Why does public mains power use 50-60 Hz and 100-240 V?

27 votes
Accepted

What is a mode?

26 votes
Accepted

What is the "interaction picture" or "rotating frame" in quantum mechanics?

25 votes
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Is there a simple way of finding the eigenstates of the creation and annihilation operator in QM?

24 votes
Accepted

Why is the Fourier transform more useful than the Hartley transform in physics?

22 votes
Accepted

How does an acoustic guitar amplify its sound?

21 votes

Why can't two different quantum states evolve into the same final state?

21 votes
Accepted

When jumping a car battery, why is it better to connect the red/positive cable first?

20 votes

Schrödinger's cat and the difficulty of macroscopic superposition state

19 votes
Accepted

Which dissipates more power, a small or big resistor?

19 votes
Accepted

Olympiad physics 1996 problem

16 votes

Really how can an observable quantity be equal to an operator?

16 votes

Does bra-ket always assume all space?

16 votes
Accepted

Derive Poisson distribution from probability per time of event

15 votes
Accepted

Definition of the $Q$ factor?

14 votes

How are quantum bits (qubits) implemented?

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