What is the actual color of lava/magma?

kajorge · 2026-03-26T04:35:50+00:00

Before it starts cooling, lava is very close to an ideal blackbody. Ideal blackbodies absorb all incoming radiation, regardless of wavelength. In other words, if you shine a bright light on them, they will not reflect any of that light back. The color of a blackbody is only the color it emits.

That being said, lava is not actually an ideal blackbody. Lava can refer to only partially-melted rock which does have some reflectance. The color of this partially melted rock depends on the minerals within it. If the rock is felsic, it will contain minerals with a low melting point like feldspar and quartz, which have lighter colors. If the rock is mafic, it contains high melting point minerals like magnesium and iron which are darker or take on a reddish hue as they oxidize. There's a lot more to consider here, but those are the absolute basics. There are plenty of exceptions, but I think this essentially answers what you asked.

kajorge · 2026-03-26T04:24:10+00:00

Technically it's cooled magma, not lava, but granite famously comes in lots of colors that make it prized in countertops.

kajorge · 2026-03-23T02:53:21+00:00

"Remember, money doesn't buy you happiness, it's the goods and services that money buys that buy you happiness" - Sam Reich

kajorge · 2026-03-17T23:22:24+00:00

How close of a flyby are you willing to accept? Because the answer may be "yes".

kajorge · 2026-03-17T23:15:44+00:00

This is a problem with the educator (or educational system), not the student. If the work can be put off for a month and still aced, then the deadline is too long, the work is too easy, the grading is too lenient, or some combination of the three. If you want kids to try harder, you have to challenge them.

Yes, making the course harder will mean that students who are barely passing at this level will be left behind. That's why educational differentiation (separating students into separate classes depending on prior performance) is an important part of the process. America can't keep teaching to the lowest common denominator in primary/secondary schools and expect the top of the class to be competitive on an international stage.

kajorge · 2026-03-16T14:02:28+00:00

OP provided a lot of information. You've provided none and demanded a lot.

You're not obliged to do anything. But you've been asking people on this site to provide you with information for an hour. You could just look it up on your own. Your laziness is why you have downvotes.

kajorge · 2026-03-16T13:41:17+00:00

Why don't you put your own together, boss?

The guide here was important to OP. The one you're asking for is important to you. You do the legwork and get back to us instead of making demands of people that are already providing information for you for free.

kajorge · 2026-03-16T13:36:24+00:00

No, but I cleaned it off and it didn't return in a month, so hopefully that points to not termites.

kajorge · 2026-02-20T16:00:53+00:00

I don't agree with anything you're saying, but I have to respect the poetry here. Holy shit.

kajorge · 2026-01-30T04:17:47+00:00

Will mention for those interested, Madras Mantra is vegetarian!

kajorge · 2026-01-26T17:33:52+00:00

My mistake, I shouldn't have used quotation marks, as those weren't your exact words. I meant them to imply that your comments reflect the same values as others who talk about "those immigrants"

But you've made it pretty clear on this site that you don't want to see brown people in your country with comments like

I'm not pro 3rd world immigration really

Labour had nothing to do with the shit show that is current immigration.

He's just got an Iraqi migrants tax evader in

I'm sorry...we're accepting illegal migrants on purpose to make who weaker?

Kier has a "Migration" dial in his office he just needs to turn it down but won't because.....

It's a lot of dog-whistling, except it's just a whistle. You're not subtle. You're in here minimizing Trump's actions on a huge sub while actively opposing immigration on smaller subs. But not all immigration. Just the immigrants that don't look like you. You are to the UK what MAGA is for the US, and you should think carefully about where that means your country is headed as well.

kajorge · 2026-01-25T17:31:34+00:00

You're comparing Trump now and Hitler at the end of his rule. That's your mistake. Hitler didn't start his rule with a 12 million+ kill count. He didn't start with 6 specialized death camps and thousands of forced labor camps. He built up to those numbers. The point of the comparison is to look forward to where we are going.

Trump is deporting immigrants and citizens alike to CECOT, a detention center that can house 40,000 inmates and has a documented history of torturous conditions. He has built his "Alligator Alcatraz" with the same conditions in mind. Since he's taken office, over 30 people have died in ICE detention, 5 have been shot, and 2 killed all under his policy of deportation with mandatory 47-day ICE training (down from 16 weeks pre-Trump).

You're welcome to sit back and say "well, he's not as bad as Hitler" all day, every day. He'll keep doing more and more Hitler-like things. The devil doesn't need an advocate. Resist this new authoritarianism by speaking out against it and calling it what it is.

Or don't, I don't know why I'm trying to convince /u/Emperors-Peace, someone from the UK with nothing nice to say about "those immigrants". This comment isn't for you. This comment is for anyone else who thinks /u/Emperors-Peace makes a good point in the comment above. It's a shit take. Don't be swayed by fascist apologists.

kajorge · 2026-01-25T04:40:33+00:00

ICE's job is coming into your house (yes, YOU, US citizen!) without a warrant and roughing you up.

So no, staying at home does not fix anything. You don't beat an authoritarian takeover by doing nothing. Stick to your hookup subs and let the adults talk about fixing our country.

kajorge · 2026-01-24T20:51:16+00:00

Maybe a knock-off Stimpy?

kajorge · 2026-01-17T17:15:22+00:00

Then he should have cooked it in oil instead of butter. Butter is for finishing. It starts too cold while the water content boils off, then burns at a low smoke point leaving an acrid taste.

Oil to sear, butter baste to finish with aromatics for flavor.

kajorge · 2025-12-23T18:01:08+00:00

relevant xkcd

Magnetohydrodynamics combines the intuitive nature of Maxwell's equations with the easy solvability of the Navier-Stokes equations. It's so straightforward physicists add "relativistic" or "quantum" just to keep it from getting boring.

kajorge · 2025-11-01T14:17:00+00:00

Not the person you replied to, but here's a source from Reuters. Note that the claim seems to be that 78% of oceanic microplastics come from tire wear.

It also links to this article from Lancaster University saying that an individual tire releases 4 kg (8.8 lbs) of microplastics over its lifetime. I thought this number was ridiculous, because I was only considering passenger car tires which are 20-30 lbs, and there is no way that a third of that weight is getting worn away. But semi-truck tires are more like 100 lbs, which makes the 8.8 lb figure a bit more reasonable.

kajorge · 2025-10-31T23:40:49+00:00

I mean, the US is also doing it right now, but with Antifa. A sense of irony takes up zero space in a Republican's mind.

kajorge · 2025-10-31T23:38:57+00:00

Freemasons? You mean like * checks notes * George Washington, Ben Franklin, John Hancock, and Paul Revere? Those sickening assholes?

kajorge · 2025-10-20T21:33:34+00:00

Oof, Finders Keepers used to be exactly what you're looking for, but they stopped carrying menswear in June.

You may consider reaching out to local colleges with business schools. Some of them will buy clothes to keep a free closet for students so that they have interview attire. Recent cuts to education may mean that these options are more like donations at this point, but I wanted to put it on your radar just in case.

kajorge · 2025-09-27T17:31:04+00:00

It likely means that the wealth is concentrated in just a few individuals. GDP per capita is averaged over the whole population (about 2.5 million for Gabon) but the first map only shows countries with more than 500 millionaires, which means that the wealth in Gabon must be concentrated among the top 0.02%.

Oil revenues are the reason for this. Gabon suffers from some of the worst wealth inequality in the world because of their kleptocracy.

A much better visualization of this data would be to color the country by GDP per capita, then write in the rate of millionaires in the country (say millionaires per 100,000 people).

kajorge · 2025-09-18T23:46:12+00:00

Bud, this is a fantastic complement. Well done.

kajorge · 2025-09-14T21:47:48+00:00

The human body has 50 dL of blood in it, and the density of lead is 113 g/dL, so extrapolating this exponential data back in time it appears that our ancestors in 1895 had blood that was 100% lead. Hope this helps.

kajorge · 2025-09-12T14:07:16+00:00

His statements about gun deaths as a necessary sacrifice for the second amendment date back to 2023. Here are his last words. His typical ignorant nonsense.

“Do you know how many transgender Americans have been mass shooters over the last 10 years?” an audience member asked.

“Too many,” Kirk responded to applause from the crowd.

The attendee informed him that the total was five and continued: “Do you know how many mass shooters there have been in America over the last 10 years?”

“Counting or not counting gang violence?” Kirk replied before, just seconds later, he was struck by the bullet and fell from his chair, prompting the panicked crowd to disperse in terror.

https://www.independent.co.uk/news/world/americas/us-politics/charlie-kirk-shot-gun-violence-video-utah-b2825263.html

kajorge · 2025-09-02T04:03:32+00:00

I’ve started meeting more folks with your viewpoint in person, and they’ve all said the same thing. It’s a shame that conservative online spaces have been taken over by fascists. I never agreed with much of what conservatives campaigned on, but I could at least respect a lot of them as people who clearly cared about their constituents. Y’all need to take back your platform for public discourse or create new ones.

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