User Chris

96 votes

Accepted

Why doesn't the brightness of a bulb change with time?

electricity thermal-radiation

answered Feb 28, 2018 at 7:37

91 votes

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Why do we need large particle accelerators?

answered Jan 25, 2018 at 9:03

75 votes

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In nuclear physics, what length year in seconds is used?

nuclear-physics time error-analysis radioactivity metrology

answered Apr 24, 2018 at 4:11

70 votes

Red shifted to what?

visible-light cosmology electromagnetic-radiation frequency redshift

answered May 7, 2018 at 7:01

56 votes

If electrons can be created and destroyed, then why can't charges be created or destroyed?

particle-physics electrons conservation-laws charge antimatter

answered Mar 23, 2021 at 8:07

51 votes

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Can a radioactive atom be prevented from decaying if it's in a REALLY strong chemical bond?

atomic-physics physical-chemistry radioactivity chemical-potential

answered Aug 17, 2020 at 2:07

47 votes

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How does one store a muon?

particle-physics experimental-physics

answered Apr 17, 2021 at 2:32

45 votes

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Is special relativity relevant to understand nuclear bombs?

quantum-mechanics special-relativity nuclear-physics mass-energy nuclear-engineering

answered Apr 22 at 18:27

35 votes

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What does "rarely" mean in NASA's statement: "technically referred to as an exosphere because it’s so thin, its atoms rarely collide."?

atmospheric-science gas moon nasa

answered Apr 26, 2021 at 21:05

33 votes

What would happen if Jupiter collided with the Sun?

astrophysics collision sun estimation jupiter

answered Apr 27, 2018 at 7:05

30 votes

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Minimal velocity to throw an object to the Sun

newtonian-gravity orbital-motion projectile solar-system celestial-mechanics

answered Mar 1, 2018 at 7:03

29 votes

Does old light contain clues to its age?

visible-light electromagnetic-radiation experimental-physics speed-of-light time

answered Nov 5, 2017 at 4:15

25 votes

Why is silicon used for making solar cells?

semiconductor-physics solar-cells

answered Nov 4, 2018 at 0:08

25 votes

Physical difference between moonlight and sunlight

optics reflection

answered Jun 13, 2021 at 4:54

23 votes

Accepted

Why does air resistance affect projectile motion in the way it does?

newtonian-mechanics fluid-dynamics

answered Mar 1, 2018 at 22:27

19 votes

What happens to a photon when it loses all its energy?

energy photons frequency

answered Jan 17, 2021 at 4:55

18 votes

Why is the mass of a Hydrogen atom lower than the sum of masses its parts?

mass atomic-physics mass-energy binding-energy

answered Aug 8, 2020 at 20:41

16 votes

If I was Schrödinger's cat, what would I feel?

quantum-mechanics superposition observables schroedingers-cat

answered Oct 10, 2018 at 14:51

16 votes

Why isn't the entropy of gas infinite if there are infinite microstates available?

statistical-mechanics entropy

answered Nov 30, 2017 at 9:42

14 votes

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Can mass of an electron be measured without measuring its charge?

mass electrons charge

answered Feb 7, 2018 at 2:58

13 votes

How do $|1⟩$ and $-|1⟩$ represent the same state?

quantum-mechanics hilbert-space quantum-information quantum-computer

answered Apr 5, 2021 at 22:32

13 votes

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Will a light come back within finite years?

general-relativity spacetime space-expansion universe topology

answered May 13 at 8:40

11 votes

Pattern in scaled down image of very close lines

optics geometric-optics

answered Mar 3, 2018 at 23:38

11 votes

What's wrong with Arnold's scaling argument on jumping height?

classical-mechanics biophysics scaling

answered Mar 13, 2018 at 19:14

11 votes

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How fast are cyclotrons?

particle-physics accelerator-physics particle-accelerators

answered May 6, 2018 at 21:40

10 votes

Why nuclear spin is ignored in Stern-Gerlach experiment?

quantum-mechanics nuclear-physics quantum-spin nuclear-magnetic-resonance

answered Jul 30, 2020 at 8:49

10 votes

Can physics really be summarized in 9 lines?

laws-of-physics

answered Apr 17 at 7:57

9 votes

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If $I \propto V$, then why is $R = V/I$ and not $I/V$?

electric-current electrical-resistance voltage

answered Mar 20, 2021 at 7:51

9 votes

Why does the Pascal's barrel experiment need a tall column of water?

classical-mechanics experimental-physics pressure fluid-statics

answered Oct 9, 2021 at 0:12

8 votes

Accepted

What came first, neutrons or electrons?

particle-physics cosmology electrons neutrons

answered May 11, 2019 at 18:50

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384 Answers

Why doesn't the brightness of a bulb change with time?

Why do we need large particle accelerators?

In nuclear physics, what length year in seconds is used?

Red shifted to what?

If electrons can be created and destroyed, then why can't charges be created or destroyed?

Can a radioactive atom be prevented from decaying if it's in a REALLY strong chemical bond?

How does one store a muon?

Is special relativity relevant to understand nuclear bombs?

What does "rarely" mean in NASA's statement: "technically referred to as an exosphere because it’s so thin, its atoms rarely collide."?

What would happen if Jupiter collided with the Sun?

Minimal velocity to throw an object to the Sun

Does old light contain clues to its age?

Why is silicon used for making solar cells?

Physical difference between moonlight and sunlight

Why does air resistance affect projectile motion in the way it does?

What happens to a photon when it loses all its energy?

Why is the mass of a Hydrogen atom lower than the sum of masses its parts?

If I was Schrödinger's cat, what would I feel?

Why isn't the entropy of gas infinite if there are infinite microstates available?

Can mass of an electron be measured without measuring its charge?

How do $|1⟩$ and $-|1⟩$ represent the same state?

Will a light come back within finite years?

Pattern in scaled down image of very close lines

What's wrong with Arnold's scaling argument on jumping height?

How fast are cyclotrons?

Why nuclear spin is ignored in Stern-Gerlach experiment?

Can physics really be summarized in 9 lines?

If $I \propto V$, then why is $R = V/I$ and not $I/V$?

Why does the Pascal's barrel experiment need a tall column of water?

What came first, neutrons or electrons?