Hottest Questions Today

2

votes

1

answer

16

views

Bound state of Hydrogen atom at large $r$

modified 6 mins ago BioPhysicist 45.5k

-1

votes

0

answers

11

views

Probibilty with double slit shot test proves it's an program so simulation Universe it is with Afterlife [closed]

quantum-mechanics particle-physics

modified 15 mins ago Scott Ryan 1

0

votes

0

answers

11

views

Area under Wien's displacement curve

homework-and-exercises thermodynamics radiation thermal-radiation

modified 38 mins ago Bill N 12.6k

1

vote

2

answers

38

views

Can I use energy conservation to find out the new amplitude of SHM?

homework-and-exercises newtonian-mechanics energy-conservation harmonic-oscillator spring

answered 10 mins ago JEB 16.2k

1

vote

1

answer

28

views

Why do the tangent vectors of coordinate curves correspond to the coordinate basis vectors?

general-relativity differential-geometry coordinate-systems vectors

modified 30 mins ago ytlu 445

-1

votes

1

answer

20

views

Is it necessarily possible to infinitely jump when jumping on an object you are holding like in some video game glitches?

laws-of-physics

answered 1 hour ago Steeven 36.2k

1

vote

0

answers

24

views

String vibration $\rightarrow$ particle properties

particle-physics string-theory normal-modes calabi-yau

modified 57 mins ago Qmechanic♦ 142k

0

votes

0

answers

18

views

How to calculate this commutator? Unitary representation of Poincare group

homework-and-exercises group-theory commutator lie-algebra poincare-symmetry

modified 52 mins ago Qmechanic♦ 142k

0

votes

0

answers

15

views

How is the interaction time distributed in quantum mechanics?

quantum-mechanics quantum-field-theory time interactions

asked 1 hour ago Arman Armenpress 366

0

votes

0

answers

47

views

Getting velocity vector from position vector [closed]

homework-and-exercises vectors velocity differentiation calculus

modified 41 mins ago Hexiang Chang 371

0

votes

1

answer

14

views

Flowrate of liquid rushing into a bucket

fluid-dynamics pressure flow

modified 26 mins ago John Rennie 309k

-2

votes

0

answers

23

views

Testing whether the speed of light is inconsistent towards different directions

special-relativity speed-of-light time-dilation

modified 2 hours ago Seojun 1

0

votes

4

answers

48

views

What is the meaning of $F=ma$? Does it mean that an object with mass $m$ will have an acceleration $a$ if an external force $F$ is applied to it?

newtonian-mechanics forces mass acceleration

answered 2 hours ago jwimberley 3,252

-2

votes

0

answers

13

views

How much more likely is a ground state electron in a hydrogen atom to be at a distance $𝑎_0$ from the nucleus than at a distance $2𝑎_0$? [closed]

quantum-mechanics homework-and-exercises energy hydrogen ground-state

modified 54 mins ago Qmechanic♦ 142k

-1

votes

0

answers

12

views

Please help with calculations and conversions - physics and maths novice

energy electromagnetic-radiation unit-conversion

asked 2 hours ago Francois Swanepoel 1

1

vote

0

answers

12

views

Langevin equation autocorrelation function

statistical-mechanics stochastic-processes brownian-motion

asked 2 hours ago GGphys 77

-1

votes

0

answers

11

views

Delayed Choice Quantum Eraser (a variation)

quantum-mechanics quantum-eraser

modified 2 hours ago Norbert Schuch 13.6k

0

votes

1

answer

26

views

How different observers measure time?

special-relativity coordinate-systems inertial-frames observers

modified 56 mins ago Qmechanic♦ 142k

2

votes

2

answers

57

views

Why can one neglect terms quadratic in derivatives of $h_{\mu\nu}$ in linearised gravity?

general-relativity metric-tensor perturbation-theory approximations linearized-theory

answered 2 hours ago Seviserful 64

1

vote

0

answers

25

views

Gravitational radiation from a perturbed metric other than Minkowski

general-relativity black-holes metric-tensor gravitational-waves perturbation-theory

modified 3 hours ago Qmechanic♦ 142k

9

votes

0

answers

61

views

Why are snowflakes flat?

symmetry atmospheric-science crystals ice

modified 4 hours ago DanielC 2,657

0

votes

0

answers

18

views

What is the value for the plasmon frequency of intrinsic $\rm Si$?

optics semiconductor-physics plasmon

modified 3 hours ago Qmechanic♦ 142k

0

votes

1

answer

35

views

How to generalize outer product into its integral form assuming continuous basis?

quantum-mechanics hilbert-space wavefunction

modified 2 hours ago Rico 13

0

votes

1

answer

38

views

Why do I get two different answers for electric field?

homework-and-exercises electrostatics electric-fields symmetry gauss-law

modified 6 mins ago John Rennie 309k

0

votes

3

answers

66

views

What is the difference between two types of velocity?

kinematics velocity definition speed calculus

modified 4 hours ago Nihar Karve 2,468

0

votes

1

answer

35

views

Lieb-Robinson Bound in $2$nd quantized description?

quantum-mechanics quantum-information speed-of-light bosons spin-models

modified 4 hours ago Norbert Schuch 13.6k

0

votes

0

answers

22

views

What is a fiducial state in quantum computing? [closed]

quantum-mechanics quantum-information terminology definition quantum-computer

modified 3 hours ago Qmechanic♦ 142k

1

vote

0

answers

31

views

Trust in wave-particle duality

quantum-mechanics classical-mechanics particle-physics wave-particle-duality

asked 5 hours ago Archie 11

0

votes

0

answers

14

views

Pressure in wake of turbulent vs laminar flow

fluid-dynamics flow turbulence

modified 2 hours ago debsim 101

2

votes

3

answers

296

views

Why does resonance occur at only standing wave frequencies in a fixed string?

waves resonance coupled-oscillators

modified 2 hours ago leftaroundabout 12k

0

votes

1

answer

42

views

Understanding the Derivation of Rabi-Oscillations

quantum-mechanics two-level-system

modified 5 hours ago Jakob 169

0

votes

1

answer

42

views

Inertial frame of reference

newtonian-mechanics reference-frames inertial-frames

answered 11 mins ago Cleonis 7,704

0

votes

0

answers

18

views

Can inner electrons get excited? Can an already excited electron get excited again without first dropping to a lower energy level?

electromagnetic-radiation electrons spectroscopy absorption photon-emission

asked 5 hours ago mad112 49

0

votes

1

answer

31

views

The time at which a car starts to skid on a rotating platform

homework-and-exercises newtonian-mechanics forces friction free-body-diagram

answered 4 hours ago Dopa 36

0

votes

0

answers

17

views

Unplugging the detector in the quantum double slit experiment

quantum-mechanics wavefunction double-slit-experiment

asked 4 hours ago user1551817 261

-1

votes

1

answer

37

views

Is supersymmetry really useful?

supersymmetry

answered 6 hours ago Simai Jia 1

3

votes

4

answers

345

views

Contradictory statements on product states for distinguishable particles in Quantum Mechanics

quantum-mechanics hilbert-space wavefunction many-body identical-particles

modified 11 mins ago BioPhysicist 45.5k

-2

votes

1

answer

28

views

What is the ratio of energies of Hydrogen in its first excited state and second excited state?

homework-and-exercises energy atomic-physics orbitals

answered 2 hours ago ytlu 445

0

votes

1

answer

13

views

If no current is able to flow through a capacitor what will be the node voltage on the other end of the capacitor opposite the voltage source?

homework-and-exercises electric-circuits voltage capacitance batteries

modified 2 hours ago Solomon Slow 7,102

-2

votes

1

answer

23

views

What does graph of a function mean?

velocity speed

answered 6 hours ago Rico 13

4

votes

9

answers

671

views

Newton's 3rd Law and a bouncing ball [duplicate]

newtonian-mechanics forces collision

modified 2 hours ago BioPhysicist 45.5k

0

votes

1

answer

12

views

Charge transfer from electrometer to metal ball

electrostatics charge potential

answered 5 hours ago Philip Wood 18.4k

0

votes

1

answer

19

views

How to derive the relationship between energy density, speed, and energy intensity?

electrostatics energy

modified 5 hours ago IvanaGyro 127

0

votes

0

answers

24

views

Finite potential whose (normalisable) wavefunction doesn't vanish at infinity

quantum-mechanics wavefunction mathematics normalization

asked 7 hours ago edkav 1

2

votes

2

answers

45

views

Is it possible to perform a Legendre transform from a Gibbs energy $G(T,p,N_i)$ expression to a state function of the form $\phi(T,H,N_i)$?

thermodynamics

modified 1 hour ago GiorgioP 13.7k

1

vote

4

answers

339

views

Can we explain velocity without time? [closed]

kinematics reference-frames time velocity inertia

modified 1 hour ago BioPhysicist 45.5k

Top Questions

Looking for more? Browse the complete list of questions, or popular tags. Help us answer unanswered questions.