User lalala

16 votes

Can 1 kilogram of radioactive material with half life of 5 years just decay in the next minute?

answered Jan 10, 2021 at 10:25

7 votes

Why do we not use cold neutrons in nuclear reactors?

answered Aug 6, 2018 at 18:59

7 votes

Why are synthetic elements unstable?

answered Feb 16, 2017 at 8:49

6 votes

Does a "Photon Box" have gravitational mass?

answered Jul 27, 2017 at 17:38

6 votes

Motivation for the use of 1-forms in General Relativity

answered Jan 29, 2018 at 8:24

5 votes

Accepted

Can a lens be used at radio frequency?

answered Oct 7, 2018 at 19:20

4 votes

Why do we use cross products in physics?

answered Dec 8, 2019 at 19:11

4 votes

Can two fermions with different energylevels be at the same position?

answered Apr 23, 2017 at 15:18

4 votes

Accepted

Can the Huygens principle be justified rigorously mathematically?

answered Apr 30, 2017 at 13:40

4 votes

Bell's theorem and how it solves the EPR paradox

answered Feb 21, 2017 at 12:40

3 votes

How do coherent isotropic radiators evade the hairy-ball theorem?

answered Feb 15, 2017 at 16:13

3 votes

Accepted

Newton's law of cooling

answered Mar 2, 2017 at 15:33

3 votes

Dual nature of matter

answered Apr 19, 2017 at 16:39

3 votes

Does a gauge transformation leave physics invariant?

answered May 18, 2017 at 19:03

3 votes

What is an event in Special Relativity?

answered Mar 1, 2018 at 13:44

3 votes

Accepted

How fast, based on the laws of physics can the Internet be?

answered Nov 13, 2021 at 21:16

2 votes

If $\mathbf{F}_{net} = m\mathbf{a}$ then how is $m\mathbf{a}$ not a force?

answered Dec 15, 2021 at 7:12

2 votes

Do continuous wavefunction form a Hilbert space?

answered Jul 24, 2022 at 19:02

2 votes

What actual difference does it make whether electric or magnetic field lines are open or closed?

answered Nov 2, 2018 at 4:51

2 votes

Accepted

Charge Distribution on a perfectly conducting hollow shell

answered Jan 14, 2019 at 17:22

2 votes

Shor's algorithm with adversary - can (delayed) erasure of value qubits cripple calculations?

answered May 9, 2018 at 6:37

2 votes

Can you "rewind" sound messages by going supersonic?

answered Nov 25, 2017 at 8:41

2 votes

What is the adjoint of the operator?

answered Jan 6, 2018 at 17:16

2 votes

Gradient, divergence and curl with covariant derivatives

answered Feb 14, 2017 at 9:33

2 votes

Acceleration of radio waves

answered Mar 5, 2017 at 7:51

2 votes

Why is this a circuit in parallel if it is topologically different than a parallel circuit

answered Mar 16, 2017 at 15:35

2 votes

Can magnetic force really be just electric force in a different frame?

answered Apr 15, 2017 at 13:53

2 votes

Accepted

Why does the Eulerian approach become invalid for intersecting trajectories?

answered Feb 27, 2017 at 16:13

2 votes

Distance times Velocity

answered Feb 15, 2017 at 17:50

2 votes

Is loop quantum gravity the only theory concerning the structure of spacetime?

answered Feb 19, 2017 at 21:32

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72 Answers

Can 1 kilogram of radioactive material with half life of 5 years just decay in the next minute?

Why do we not use cold neutrons in nuclear reactors?

Why are synthetic elements unstable?

Does a "Photon Box" have gravitational mass?

Motivation for the use of 1-forms in General Relativity

Can a lens be used at radio frequency?

Why do we use cross products in physics?

Can two fermions with different energylevels be at the same position?

Can the Huygens principle be justified rigorously mathematically?

Bell's theorem and how it solves the EPR paradox

How do coherent isotropic radiators evade the hairy-ball theorem?

Newton's law of cooling

Dual nature of matter

Does a gauge transformation leave physics invariant?

What is an event in Special Relativity?

How fast, based on the laws of physics can the Internet be?

If $\mathbf{F}_{net} = m\mathbf{a}$ then how is $m\mathbf{a}$ not a force?

Do continuous wavefunction form a Hilbert space?

What actual difference does it make whether electric or magnetic field lines are open or closed?

Charge Distribution on a perfectly conducting hollow shell

Shor's algorithm with adversary - can (delayed) erasure of value qubits cripple calculations?

Can you "rewind" sound messages by going supersonic?

What is the adjoint of the operator?

Gradient, divergence and curl with covariant derivatives

Acceleration of radio waves

Why is this a circuit in parallel if it is topologically different than a parallel circuit

Can magnetic force really be just electric force in a different frame?

Why does the Eulerian approach become invalid for intersecting trajectories?

Distance times Velocity

Is loop quantum gravity the only theory concerning the structure of spacetime?