Physics - Q&A

80%

+6 −0

Unusual way to write spacetime coordinates/metric: Is there any downside?

1 answer · posted 9mo ago by celtschk‭ · last activity 9mo ago by dmckee‭

special-relativity

77%

+5 −0

How does probability conservation work in Dirac's original formulation of relativistic QM?

1 answer · posted 8mo ago by JoshuaTS‭ · last activity 8mo ago by Derek Elkins‭

special-relativity quantum-mechanics hilbert-space dirac-equation normalization

77%

+5 −0

How do constraints work in Lagrangian systems?

1 answer · posted 8mo ago by JoshuaTS‭ · last activity 8mo ago by Derek Elkins‭

classical-mechanics lagrangian-formalism constrained-dynamics differential-geometry

77%

+5 −0

What is inflation in cosmology?

2 answers · posted 5mo ago by JohnDoea‭ · last activity 2mo ago by Istiak‭

inflation cosmology

71%

+3 −0

What is the meaning that the universe is flat?

2 answers · posted 2mo ago by JohnDoea‭ · last activity 2mo ago by celtschk‭

universe

66%

+2 −0

Why would a 1.74 index lens be more prone to chip and be less resilient than 1.67?

1 answer · posted 7mo ago by VLDR‭ · last activity 7mo ago by Olin Lathrop‭

lenses

66%

+2 −0

Motion of charged particle inside a magnetic field

0 answers · posted 2mo ago by MissMulan‭ · edited 1mo ago by MissMulan‭

classical-mechanics electrodynamics electromagnetism lorentz

66%

+2 −0

Interaction terms in Srednicki's proof of spin-statistics theorem

1 answer · posted 6mo ago by JoshuaTS‭ · last activity 5mo ago by Mithrandir24601‭

quantum-field-theory spin-statistics

60%

+1 −0

Signal modeling as only digital, only analogue, or as both

3 answers · posted 1mo ago by JohnDoea‭ · last activity 1mo ago by Lundin‭

signal-processing

60%

+1 −0

Find jerk of time varying force

1 answer · posted 1mo ago by MissMulan‭ · last activity 1mo ago by Mithrandir24601‭

newtonian-mechanics potential-energy acceleration

60%

+1 −0

Why we can't find a particle accelerating unless there's some other particle accelerating somewhere else?

3 answers · posted 1mo ago by Istiak‭ · last activity 1mo ago by Olin Lathrop‭

classical-mechanics force

60%

+1 −0

Should Earth's moon colonies being deep underground ensure natural heating?

1 answer · posted 3mo ago by JohnDoea‭ · last activity 3mo ago by Dave Tweed‭

Moon

60%

+1 −0

Natural ways to acquire gravity for a colony on earth's moon

2 answers · posted 3mo ago by JohnDoea‭ · last activity 1mo ago by Canina‭

Moon Gravity

60%

+1 −0

Applying Young-Laplace equation on meniscus formed due to rise of liquid on a single plate

0 answers · posted 7mo ago by TripleFault‭

pressure young-laplace

60%

+1 −0

What is semiholonomic?

1 answer · posted 17d ago by ...‭ · last activity 17d ago by HDE 226868‭

semi-holonomic

57%

+2 −1

Why should there not be water below 6kms in the Earths crust?

0 answers · posted 6mo ago by Conrado‭ · edited 6mo ago by Conrado‭

pressure

55%

+3 −2

Would we need Alternating Current if superconducting wires existed?

2 answers · posted 8mo ago by theabbie‭ · last activity 7mo ago by celtschk‭

superconductor alternating-current

50%

+0 −0

What is virtual work?

0 answers · posted 1mo ago by Istiak‭ · edited 1mo ago by Istiak‭

classical-mechanics forces virtual-work

50%

+0 −0

What happens if an electron collides with another electron?

0 answers · posted 1mo ago by Istiak‭

electrodynamics atoms electrons protons

50%

+0 −0

Prove differential form of Lagrangian

1 answer · posted 30d ago by Istiak‭ · last activity 30d ago by celtschk‭

lagrangian-formalism

50%

+0 −0

What happens if an electron collides with a proton?

2 answers · posted 1mo ago by Istiak‭ · edited 1mo ago by Istiak‭

electrodynamics atoms electrons protons

50%

+1 −1

What does Lagrangian actually represent?

2 answers · posted 30d ago by Istiak‭ · last activity 19d ago by Istiak‭

lagrangian-formalism

50%

+0 −0

Superconductivity

0 answers · posted 27d ago by MissMulan‭

solid-state superconductivity

50%

+0 −0

Find position of a particle at a time

1 answer · posted 1mo ago by MissMulan‭ · last activity 1mo ago by celtschk‭

time newtonian-mechanics forces

50%

+0 −0

What's the importance of Poisson brackets?

0 answers · posted 15d ago by Istiak‭ · edited 14d ago by Istiak‭

hamilton-dynamics hamilton-formalism poisson-brackets

50%

+1 −1

Book suggestion for Classical Mechanics

1 answer · posted 1mo ago by Istiak‭ · last activity 13d ago by Istiak‭

classical-mechanics book-suggestion

50%

+0 −0

Where did the measuring systems (metric & imperial) originate and how?

0 answers · posted 2mo ago by Mark Giraffe‭ · edited 2mo ago by Mark Giraffe‭

measurement metric-system imperial-system

50%

+0 −0

Magnetic charges to solve interaction between 2 magnetic dipoles

1 answer · posted 2mo ago by MissMulan‭ · last activity 2mo ago by Olin Lathrop‭

electrostatics

50%

+0 −0

decibel level of human hearing(human-auditory-range)

1 answer · posted 4mo ago by Istiak‭ · last activity 4mo ago by Olin Lathrop‭

decibel sound wave

50%

+1 −1

Does folding glasses increase the probability of separating at the hinge?

1 answer · posted 6mo ago by VLDR‭ · last activity 6mo ago by Olin Lathrop‭

lenses

50%

+0 −0

Explain like I'm 5 – After glancing at a clock, why does the first second sometimes feel longer than the rest? [closed]

0 answers · posted 7mo ago by VLDR‭ · closed 7mo ago by Mithrandir24601‭

time

50%

+0 −0

How can I turn a floor lamp, that lights upward, into a reading light? [closed]

0 answers · posted 8mo ago by VLDR‭ · edited 2mo ago by VLDR‭

light

40%

+0 −1

If planet 9 exists, is it correct to say that it is a "dark planet"?

2 answers · posted 5mo ago by JohnDoea‭ · last activity 1mo ago by HDE 226868‭

our-solar-system planet-9

40%

+0 −1

Is it rational to freeze water bottles during colder nights, and place them in front of a fan during warmer days?

1 answer · posted 6mo ago by VLDR‭ · last activity 5mo ago by manassehkatz‭

classical-mechanics

37%

+1 −3

How dangerous is mounting and firing a gun on another human's body part? [closed]

1 answer · posted 6mo ago by VLDR‭ · closed 2mo ago by Mithical‭

classical-mechanics

33%

+0 −2

Must calendars be based on solar systems?

3 answers · posted 18d ago by JohnDoea‭ · last activity 11d ago by MissMulan‭

time

28%

+0 −3

For cleaning food and objects, power scrubber vs. Electric rotary toothbrush? [closed]

0 answers · posted 7mo ago by VLDR‭ · closed 7mo ago by Mithrandir24601‭

pressure

Communities