15,767 reputation
24275
bio website arXiv.org
location Toronto, Canada, eh?
age 26
visits member for 2 years, 4 months
seen 9 hours ago

I'm a cosmologist. I did my undergraduate in space engineering (rocket science) and my graduate degree in cosmology. I enjoy Dark Energy, curvature, and modified gravity, but I mainly focus on inflation.


18h
comment To what depth can a whirlpool descend?
People have survived going over Niagara Falls in a barrel. Given that, I won't say people couldn't survive a whirlpool in a barrel. Don't try this at home though
18h
comment Why don't lakes have tides?
@A.L "across" is nonspecific. It just means from one side to the side immediately opposite it. In context, any line that starts and ends on the shore of the same lake can be said to be across the lake. In that way, the largest crossing is the size referred to
18h
comment Refraction, diffraction or reflection of human voice
there are numerous things that work together. But have you ever heard someone's stomach growl? Or heard someone speaking in another (closed) room? It's not the only reason you hear them, but it's a contributor
18h
revised Refraction, diffraction or reflection of human voice
edited tags
18h
comment Refraction, diffraction or reflection of human voice
don't forget that sound waves can go through solid objects (like the back of the speaker's throat).
18h
comment To what depth can a whirlpool descend?
I suppose whether you could survive depends on what type of barrel and what is causing the whirlpool. Either way, you'd be fairly dizzy afterwards
19h
reviewed Close Putting an Electron on a Conducting Sphere
19h
reviewed Close How can black holes be observed to grow?
19h
revised Wave equations - how to get a real solution from imaginary roots
edited tags
20h
comment Do matter that falls in a black hole go to the future and the end of the universe?
The black hole doesn't really radiate anything. The matter around it radiates, granted, but that's not really a part of the hole yet. Also, all realistic measurements effect changes. It would be backwards to come up with a new word for measurements that don't change anything when all currently performed measurements produce changes in some way or another
20h
comment What defines a unit system and how many constants can we set to 1?
@DanielSank It's true that we've dropped too much formality and made it more confusing when you approach something. But when everyone knows what you mean when you say "we've made $c=\hbar=1$ and therefore [Energy]=[Mass]=[Length]$^{-1}$", it saves time to simplify. But I can't disagree that it's done too often and makes some things confusing. Problem is, it's sometimes hard to break the habit or know when not to simplify
20h
comment What defines a unit system and how many constants can we set to 1?
@TMG I don't understand the question. If you define $c$ and $\frac{1}{4\pi\epsilon_0}$ to be 1, the consequence is that $\mu_0=4\pi$ is a necessary constraint.
20h
comment Do matter that falls in a black hole go to the future and the end of the universe?
@Timaeus nah, I think black hole is still the best name we have. Something that light cannot escape from is black and something that things can only either avoid or fall into is a hole. Seems very appropriate to me
20h
answered What defines a unit system and how many constants can we set to 1?
21h
comment To what depth can a whirlpool descend?
From what I learned in cartoons, if you pull the big plug out of the bottom of the ocean, the whirlpool will extend all the way down
21h
comment Creating nanosecond pulses from a CW laser source
@Bearded_Bobbin Well, normally I'd suggest magnets as the solution to any problem. But unfortunately, lasers are immune to magnets, so I went with my backup solution
21h
comment Density of a substance
@James good point.
21h
comment Density of a substance
either way, the strategy and formula remains the same
21h
comment Density of a substance
@James that would reduce the average density more so because it would increase buoyancy. I'm assuming that the scenario allows for the car to completely fill with water, and that the cabin cavity is not included in the calculation
21h
reviewed Leave Open Gadolinium poisoning vs Holmium Poisoning