Recent questions in Theoretical Physics

+19 votes

0 answers

What is the evidence for the existence of higher dimensional objects other than energy/matter as described by general relativity and quantum theory (e.g., string theory)?

asked Sep 14, 2022 in Theoretical Physics by Choosing a cordless

+23 votes

0 answers

How can a black hole have mass, since the major part within the event horizon cannot be measured?

asked Sep 14, 2022 in Theoretical Physics by max81

+2 votes

0 answers

Isn’t it possible that the final observed state of entangled particles was set when the particles were entangled? If so, there is no “spooky action at a distance.”

asked Sep 14, 2022 in Theoretical Physics by Pink Panther.

+17 votes

0 answers

How do we know that particles are really entangled, and don't have some information stores into them at the moment of entanglement to determine the future states?

asked Sep 13, 2022 in Theoretical Physics by gswainyboy

+11 votes

0 answers

What is the largest roadblock scientists face in devising a theory of everything?

asked Sep 13, 2022 in Theoretical Physics by CrystalSculptor

+26 votes

0 answers

How can I find the position of a particle in a free state?

asked Sep 13, 2022 in Theoretical Physics by Glennuk

+82 votes

0 answers

Why was Richard Feynman so good at explaining things?

asked Sep 13, 2022 in Theoretical Physics by Starwars1

+7 votes

0 answers

A quantum system cannot behave chaotically, since the Schrodinger equation is linear. So how does quantum theory explain the existence of chaotic systems?

asked Sep 13, 2022 in Theoretical Physics by countdown

+27 votes

0 answers

If two objects collide and one is initially at rest, is it possible for both to be at rest after the collision? Is it possible for only one to be at rest after the collision?

asked Sep 12, 2022 in Theoretical Physics by MidnightWhirl

+17 votes

0 answers

Why do we remember our past but not our future?

asked Sep 12, 2022 in Theoretical Physics by trustedman

+280 votes

0 answers

What's the point of theoretical physics?

asked Sep 12, 2022 in Theoretical Physics by Tiefa_76

+33 votes

0 answers

Why a string model? I imagine that using a point doesn't convey the idea of connection that the theory wants to get at it, but does this connection have to be 1 dimensional? Could it be 2 dimensional or beyond?

asked Sep 12, 2022 in Theoretical Physics by CrystalTwilight

+22 votes

0 answers

How can you measure the fourth dimension?

asked Sep 12, 2022 in Theoretical Physics by Richard34

+505 votes

0 answers

How do dimensions work in physics? Why are there four dimensions instead of three or six or ten?

asked Sep 12, 2022 in Theoretical Physics by MysticTwilight

+19 votes

0 answers

When a river is flowing, does all the water move at the same speed, or do different levels of the water move differently?

asked Sep 11, 2022 in Theoretical Physics by Alan22

+227 votes

0 answers

What are the implications of string theory for the nature of time?

asked Sep 11, 2022 in Theoretical Physics by Removed 4

+1 vote

0 answers

What is the current model of the atom?

asked Sep 11, 2022 in Theoretical Physics by Indiana Jones

+80 votes

0 answers

Why is linear motion relative but rotation absolute?

asked Sep 11, 2022 in Theoretical Physics by pauldreed

+10 votes

0 answers

If the Universe continues expanding forever, will the Poincare recurrence theorem 'cause' it to cycle through every possible configuration endlessly?

asked Sep 11, 2022 in Theoretical Physics by RadiantNomad

+225 votes

0 answers

What is String Theory (M-theories)? Why is it difficult to test it?

asked Sep 11, 2022 in Theoretical Physics by airvisit

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