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Puk's user avatar
Puk
  • Member for 6 years, 9 months
  • Last seen this week
50 votes
Accepted

Why do higher harmonics have a lower amplitude than the fundamental frequency?

34 votes
Accepted

Is it possible to convert gravitational energy directly into electrical energy?

33 votes
Accepted

Based on my calculations, we cannot see the Earth from the ISS. Obviously it's wrong. Why?

25 votes
Accepted

Does rigid body rotation contradict Newton's first law?

18 votes

Does amplitude really go to infinity in resonance?

17 votes

Does Hooke's Law apply to all springs?

15 votes

Why isn't the Doppler effect (for sound waves) symmetric with respect to source and receiver?

14 votes

What is the concept of hole in semiconductor physics?

14 votes
Accepted

Why is the kinetic energy for non-relativistic velocities not described by $KE=mc^2$?

13 votes

Is 13 really the answer for the "Devil's problem" in physics (a rolling tube with a rod)?

12 votes

What's the point of an RMS value?

12 votes
Accepted

What is actually the clear, precise and world-wide accepted definition of TENSION FORCE?

12 votes

Why do capacitors in series have same charge?

12 votes

How to handle divergences in Poisson's equation in the presence of a point charge?

10 votes
Accepted

Skylight reflection shows birefringence patterns

10 votes

When a ball on a rope swings in a circle, is there both centripetal force and tension force?

9 votes
Accepted

What is the difference between uniform velocity and constant velocity?

9 votes

Why is the electrostatic force felt in straight lines?

9 votes

Least squares fit versus averaging

9 votes
Accepted

How to cool a liquid the most efficient way by submerging solids into it?

8 votes
Accepted

Addition of forces on a rigid body instead of a point

8 votes

Why does the aggressively bowed string go sharp?

8 votes

If inductors block AC then how are they used In LCR circuits?

8 votes
Accepted

Does the unit "volt-seconds" have any interesting interpretation?

7 votes

Derivation of Coulomb's law from Maxwell's equations

7 votes

Relation Between Gravitational Potential and Acceleration due to gravity

7 votes

Do accelerated moving electrons radiate electromagnetic energy?

6 votes
Accepted

About the Fermi-Dirac distribution

6 votes

Differences in Double slit experiment and 2 slit Diffraction

6 votes
Accepted

Newton's Second Law in vertical launch of a rocket

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