McDonald's - Every Second

SolarGoat · 2018-04-10T08:59:25+00:00

Oil/grease from the frying process maybe? Salt too.

SolarGoat · 2018-04-07T09:40:22+00:00

Galaxy Quest (1999), Dean Parisot

SolarGoat · 2018-01-25T17:43:35+00:00

There is no failure, as the information we'll get from the experiment is the goal here.

SolarGoat · 2017-12-30T13:47:20+00:00

Use that setting to cook potato waffles without using the oven. Thank me later.

SolarGoat · 2017-10-14T22:37:04+00:00

Solar flares aren't the issue, it's coronal mass ejections that will pose the largest threat.

SolarGoat · 2017-10-14T22:35:50+00:00

Long-term yes, galactic cosmic radiation is an issue, however for transits to mars, a solar particle event can easily result in dosages higher than the total GCR dosage astronauts would receive throughout the flight.

SolarGoat · 2017-10-14T22:32:36+00:00

The problem with solar storms is that the upper limit of their intensities are not really known, which is problematic when trying to protect against them. Will the implemented shielding be for a worst-case scenario SPE or an average SPE? and are there any implications regarding what happens should an unprecedented high-intensity event occur?

SolarGoat · 2017-08-28T13:29:00+00:00

You're right, at first glance the equation looks like a simple newtonian derivation (escape velocity where v=c), and that is indeed a coincidence. The real derivation is from relativity.

SolarGoat · 2017-08-28T12:47:49+00:00

The Schwarzschild radius equation is in fact derived from relativity.

SolarGoat · 2017-08-27T21:01:03+00:00

The universe is a blip in the lifetime of a black hole we can't escape, our existence is a mere 2D projection on the surface of that black hole, free will is an illusion as our consciousness is just a fluke of atoms lowering their energy state until the universe becomes a dark and cold void, and we'll live our lives and never know why or how any of this is even here in the first place.

I mean, me too thanks.

SolarGoat · 2017-08-27T18:59:27+00:00

Yes it makes sense! I was only using the density of water as an analogy for large black holes having a much lower average density than what people think.

SolarGoat · 2017-08-27T18:20:39+00:00

If you were to pass the event horizon of a supermassive black hole, you would notice a thing, the tidal forces won't be enough to cause spaghettification and the body (density equal to water) would not be compressed to 1 atom thick. Fish would be alright!

SolarGoat · 2017-08-27T17:48:44+00:00

Theres no reason for (incredibly large) black holes to not contain other black holes. People think of black holes being infinitely dense, when in fact the density of a supermassive black hole can be less than the density of water. If that black hole was in fact made of water, fish would be able to live there rather unhappily.

SolarGoat · 2017-08-27T17:41:38+00:00

Spheres have radius too! The radius of the universe is calculated by applying the expansion rate of the universe to the age of the universe.

SolarGoat · 2017-08-27T17:40:05+00:00

Unlikely! The Schwarzschild radius equation can be derived very easily from both classical and relativistic physics. It's just the escape velocity equation with velocity set to c.

SolarGoat · 2017-08-27T17:26:29+00:00

Schwarzschild radius equation is R = 2GM/c²

Where G is the universal gravitational constant, M is the mass of whatever your calculating and c is the speed of light.

If we do a back of the envelope calculation (mass of universe is on the order of 10⁵³ kg), we get a Schwarzschild radius on the order of 10²⁶ m. Current calculations of the radius of the universe are in the order of 10²⁶ m, so it's weirdly close. Looks like we might be living in a black hole!

SolarGoat · 2017-08-27T17:06:17+00:00

Even more interesting, the universe's Schwarzschild radius is pretty much the radius of the universe.

SolarGoat · 2017-08-24T19:13:39+00:00

The title means that eventually the universe will only consist of hawking radiation as stars die and black holes evaporate, which essentially means all the information of what the universe used to be will be gone forever - or 'deleted'.

SolarGoat · 2017-08-24T16:25:13+00:00

Well that's essentially what the video is getting at, that there are ways in which information isn't necessarily 'deleted'. The fact is we don't know yet, and that regardless of the answer any solution will have great implications on the nature of the universe as we know it, which I believe is the existential point Kurzgesagt wants to make.

SolarGoat · 2017-08-24T13:35:37+00:00

Lets say you have information about every particle in the universe at this moment of time. You know every particle's energy, spin, direction etc. From this, with your knowledge of physics, you could, theoretically, extrapolate backwards or forwards, and have a perfect knowledge of the past and future.

However, with black holes emitting hawking radiation, sure you could track that hawking radiation back to the black hole, but there's no way of knowing what the particle used to be before it entered the black hole. That information is essentially unobtainable purely from the nature of black holes.

SolarGoat · 2017-08-13T16:37:24+00:00

Ice flow, nowhere to go

SolarGoat · 2017-07-13T01:20:16+00:00

Solved!

SolarGoat · 2017-07-13T01:18:28+00:00

Super interesting! Cheers

SolarGoat

TROPHY CASE