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David Elm
  • Member for 5 years, 8 months
  • Last seen this week
  • California, United States
13 votes

Can Newton's laws of motion be proved (mathematically or analytically) or are they just axioms?

8 votes

Why can electric cars recoup energy from braking, but a spaceship cannot?

8 votes
Accepted

Where does the electron come from when a free neutron transforms?

6 votes
Accepted

If a planet's core is heated by its gravitational pressure, where does that energy come from?

6 votes

What is a phonon?

5 votes
Accepted

Momentum of a charged particle in a magnetic field

5 votes

Can a magnet bend light?

5 votes

How can a photon collide with an electron?

3 votes

Tempo versus Pitch

3 votes

What is the reason that Quantum Mechanics is random?

3 votes

How are the higher derivatives (jerk, jounce) of position with respect to time used in physics?

2 votes

Reason why only massless particles can travel at speed of light?

2 votes

What is the speed of a black hole?

2 votes

Is linear monemtum conserved with in angular momentum?

2 votes

Has everyone been drawing EM light waves wrongly this whole time?

2 votes

How to measure EMF of a Cell?

2 votes

Are vacuum fluctuations really happening all the time?

2 votes

Can photons be created without an electric charge involved?

2 votes
Accepted

Is it possible for there to be a spacetime which shares one of our dimensions?

2 votes

How to determine the sign conventions when two masses are attached via pulley when one of them on inclined plane?

2 votes

How is work done by friction in rolling without slipping zero?

2 votes

How to deduce $E=(3/2)kT$?

1 vote

Where does mass deficit energy go?

1 vote

Could epicycles approximate anything to any precision? In what way is QED different?

1 vote
Accepted

Physical interpretation of $\frac{\partial \rho}{\partial t} + \frac{\partial j}{\partial x}=0$

1 vote

Why can the cross product of two vectors be calculated as the determinant of a matrix?

1 vote

The tangential component of the acceleration of a particle

1 vote

Is no acceleration a cause or consequence of no net force?

1 vote

Could an atom have a binary nuclei system?

1 vote

Momentum and energy as a function of time