Steven Lu
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 Jun 20 awarded Excavator Jun 20 revised Why don't electrons crash into the nuclei they “orbit”? Pauli exclusion principle is the name of the one i was taught Jun 20 suggested approved edit on Why don't electrons crash into the nuclei they “orbit”? Dec 22 awarded Autobiographer Nov 12 awarded Popular Question May 6 comment Chasing a photon "photon at $0.9999999999c$" Surely you mean to say that this is a particle, as such a particle cannot be a photon... May 6 comment What is the period of a physical pendulum without using small-angle approximation? Hey @RodyOldenhuis I'm curious about why it appears (in the second plot) that the friction of the string does not work to reduce the amplitude of the oscillation. It will be working to remove energy from the system, right? Presumably some behavior like the third graph (but very much subdued) is expected. May 6 comment How does a car turn without any skidding? I think the point that the OP is uncomfortable with is that the rear wheels (and indeed the front wheels on Ackermann steering geometry too!) are slipping (minimally...) due only to their having nonzero width. Apr 24 comment Orbital mechanics and rocketry: Is it ever a good idea to intentionally lower periapsis? @DeerHunter I see. so plane changes should be performed at apoapsis? That makes sense (lower delta-v at lower orbital speed to perform the same plane change)... So i'd want to adjust the position of the apoapsis to coincide with one of the rising or descending nodes? Because it's too difficult to know where or how to get that apoapsis in the right spot that ahead of time (before entering an orbit) Apr 24 accepted Orbital mechanics and rocketry: Is it ever a good idea to intentionally lower periapsis? Apr 24 comment Orbital mechanics and rocketry: Is it ever a good idea to intentionally lower periapsis? You're awesome, thanks! Apr 24 comment Orbital mechanics and rocketry: Is it ever a good idea to intentionally lower periapsis? @DeerHunter you're probably right. My background isn't in this field Apr 24 revised Orbital mechanics and rocketry: Is it ever a good idea to intentionally lower periapsis? added 261 characters in body Apr 24 revised Orbital mechanics and rocketry: Is it ever a good idea to intentionally lower periapsis? added 231 characters in body Apr 24 revised Orbital mechanics and rocketry: Is it ever a good idea to intentionally lower periapsis? added 231 characters in body Apr 24 revised Orbital mechanics and rocketry: Is it ever a good idea to intentionally lower periapsis? added 231 characters in body Apr 24 asked Orbital mechanics and rocketry: Is it ever a good idea to intentionally lower periapsis? Dec 2 comment With Newton's third law, why are things capable of moving? This answer is completely awesome. My question to you is how on earth did you decide it that it was better to write in an entire warning label instead of removing the word "match"? Jun 28 comment Does diffraction contribute to the Black Drop effect? Right. I remember now from my class on Physics of Sound that the diffraction effect of structures depends on the pitch of the sound. I'm sure if I work out the expressions and factor in the distances the attenuation factor due to diffraction will work out to an infinitesimal quantity. This quantum effect would probably affect the measurement of light intensity there for a nanosecond. Jun 27 asked Does diffraction contribute to the Black Drop effect?