188 reputation
7
bio website stevenlu.net
location Burlington, MA
age 25
visits member for 3 years, 2 months
seen 1 hour ago

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?
Dec
20
awarded  Scholar
Dec
20
comment Calculating stress without strain
Well of course you get the accept. Not gonna hold out on ya.
Dec
20
accepted Calculating stress without strain
Dec
20
comment Calculating stress without strain
Well... I think I still need a bit more direction in the way of how to get it done though.