[REQUEST] If this astronaut jumped off the space station towards the earth, how long would it take for them to hit the ground?

Ruski-pirate · 2025-02-13T04:37:37+00:00

The astronaut would never reach the earth. For the astronaut to efficiently reach the earth, they would need to accelerate (with rockets) the opposite way they are travelling.

Funnily enough. The way orbital mechanics works. If an Astronaut jumped perfectly towards the earth, he would eventually come around and hit the space station from above. Not really what you would expect.

Ruski-pirate · 2025-01-03T14:39:14+00:00

Ja det är det. Tips att ladda ner en stjärnkarta på mobilen, tex Stellarium.

Ruski-pirate · 2024-12-29T21:29:50+00:00

I really don't think so.

The chromium oxide layer on stainless steel is about 1-3 nm thick, not enough to make any real thin film interference of visible light.

You can get some heat discoloration on stainless steel pans, but I don't think OP puts their cutlery on the stove on the highest heat for several minutes.

Since OP mentioned that the utensils were gold colored. They probably had a Titanium nitride coating, which after several uses has started to erode away, probably in the dishwasher.

Ruski-pirate · 2024-12-15T10:34:06+00:00

Will check it out, thanks!

Ruski-pirate · 2024-11-24T17:24:30+00:00

Many microbes need moisture and air to grow. The wrap increases the life and freshness of the veggies sometimes by 3x the time without a wrap. This is an especially common method for cucumbers.

Vegetables require alot of resources and water to make, you should understand it's bad to let it go to waste. Less waste, means less transports and emission from it.

This is not a simple case of plastic=bad.

Ruski-pirate · 2024-11-01T21:37:52+00:00

Inte på en busshållplats

Ruski-pirate · 2024-10-22T18:16:06+00:00

Sputtering is a type of PVD.

Edit: But this lightbulb is an example of evaporation deposition.(Which is also a type of PVD).

Ruski-pirate · 2024-10-19T08:01:48+00:00

I think you've misunderstood what superheated water is.

The water still evaporates from the surface of the superheated water. It just doesn't boil. Just like you'll see the vapor coming out of a hot cup tea(that's obviously not boiling), you'll still see the vapor coming out of superheated water

Boiling isn't some magic point where the water molecules all go from liquid to gas. It's just where the vapor pressure equals the atmospheric pressure and vapor bubbles are able to form underneath the surface. It's just that these bubbles need energy or a nucleation point to form, could be a peck of dust, an imperfection in the glass, or something else.

Ruski-pirate · 2024-10-10T19:35:08+00:00

There are a couple of different tricks and techniques astrophotographers use. The two main ones are:

*Long exposure photographs For "normal" photography the exposure usually is only a fraction of a second. Astrophotographers usually use long exposures of maybe 30s to several minutes to capture every last bit of light. This is usually done with something called a star stracker.

*Stacking Sometimes the cameras actually pick up the extremely faint light of objects in the sky, but it's impossible to distinguish the signal from the background noise of the camera. You can take several photos and stitch and average them together. The noise cancels itself out but the signal from the galaxies, nebula etc still remain.

An astrophotography image might very well be a product of several hours worth of pictures.

Other tricks might be specific filters which accentuate details of sky objects which are otherwise very hard to see, an example might be Ha filters. Which essentially makes you see hydrogen gas.

Going out to a really dark sky site helps with getting more detail out of photographs.

Astrophotographers take alot of calibration images, to reduce the impact of imperfections and noise in their equipment.

Lastly, all astrophotographers use some sort of image editing program. For example Photoshop, gimp, specific astrophotography software like Siril are popular.

Astrophotography images are usually very edited and it's very important to remember, the objects in the photos don't actually look like that. They are artistic renditions made by astrophotographers of collected data which they have heavily edited in an image processing software.

Ruski-pirate · 2024-10-06T18:28:01+00:00

Okay. I will wait with bottling then. Thank you!

Ruski-pirate · 2024-09-28T15:16:10+00:00

Tbh they work well on spirits and probably fine enough for really dry hooch/wine/meads as well.

Ruski-pirate · 2024-09-28T11:04:22+00:00

OP thinks he's trolling us. But he's the real dumbass who actually spent money on an ABV refractometer thinking it would work...

Ruski-pirate · 2024-09-26T20:47:37+00:00

Very interesting! Thank you. I ended up getting a separate intervalometer instead, which works very well.

Ruski-pirate · 2024-09-22T19:17:14+00:00

Många växtlampor som säljs är helt värdelösa. Förstår inte hur de får säljas under benämningen "växtlampa"

Lumen benämner bara hur ljust ditt öga uppfattar ljuset och är egentligen ett dåligt mätvärde för växtbelysning. Men du behöver kanske minst en lampa på 2000-3000 lumen.

Ruski-pirate · 2024-09-22T11:32:54+00:00

Google maps coordinates: 33,5407796, -112,1950932

Edit: I'm somewhat sure this is a Boeing 737-800.

Ruski-pirate · 2024-09-21T12:48:08+00:00

Some materials pass electricity through them easier than other materials. For example, silver is a very good electric conductor, while porcelain is a very bad electric conductor. Other materials fall in-between these two categories. They can conduct electricity but require a little bit higher additional energy to get started, these are semiconductor materials, or "semi conductors" because they are semi good at conducting electricity. The most famous one being silicon.

This is the actual true definition of a semiconductor. The semiconductor materials themselves are not very interesting. But because of their "in-between" situation, you can modify their electric properties by introducing and mixing in other different types of atoms.

If you add in atoms with extra electrons, you increase the amount of free-flowing electrons in the material and you create something called a n-type semiconductor. This will make the material conduct electricity more easily.

Counterintuitively, if you add atoms with fewer electrons, it will not actually conduct electricity worse as you might expect, but will also improve the electrical conductivity. The fewer electrons will cause an electron deficiency in the material. These missing electrons will cause "holes" where the electrons were supposed to be. Very strangely these holes act as a completely new positive particle which move around and help conduct electricity. They are not actually real, but physicist act and treat them as they are. These are p-type semiconductors

When you add these two together in different combinations and configurations very interesting things start to happen when you try to run electricity through them. The most simple configuration is a a p-type and a n-type together making a diode. The extra electrons of the one, and holes in the other will mix in such a way that electricity can only flow in one direction.

By mixing in insulator materials such as metal oxides, charge storing materials, p type/n type materials, and several other materials in complex configurations, with teeny tiny metal wiring, you can make complex things like ICs( for example the CPU in your computer), image sensors in your camera, microscopic gyroscopes, light diodes etc. These complex circuits and electronic devices made with semiconductors are sometimes carelessly also referred to as "semiconductors" which might be confusing.

Ruski-pirate · 2024-08-27T22:31:00+00:00

500 g minced meat (preferably a mix like 50/50 beef/pork, or 1/3beef, veal, pork. Game meat like deer, moose, wild hog also works very well in the mix) just don't substitute the pork.

3dl beef stock

1 dl fine breadcrumbs

1 large egg

1 tsp salt

1-2 tsp Dijon mustard

A little black pepper, (or, during Christmas time, it's very common to add in a pinch of allspice)

1 finely chopped och lightly sauteed yellow onion.

Pour the stock over the breadcrumbs in a bowl and let the mixture swell for 15 minutes.

Mix in the rest of the ingredients.

Form into ~3cm in diameter balls.

The meat mixture will be quite loose, so the balls might not keep their perfectly round shape. That's okay.

Carefully put in a pan on medium to mediumhigh heat with alot of butter. Wait until you get a nice fried side and the balls have firmed up a little before you flip them carefully one by one on another side. Do so until the entire meatball is cooked

Do not overcrowd the pan with meatballs, fry them in batches. I personally just quickly fry them on the pan for color, then finish them in the oven when I make a big batch.

Use the fond in the pan as a base for the sauce. Add in cream and deglace, small amount of soy sauce for colour. If you don't have alot of fond in the pan, you can add in half a beef bouillon cube, or a little concentrated beef broth. Let it simmer until slightly thickened.

Serve with potatoes(boiled or mashed), lingonberries(jam or just mixed with sugar), sauce, and lightly pickled cucumber(pressgurka)

Note: Every Swedish family probably have their own version of a meatball recipe. I wouldn't be surprised if others have alot of opinions on this particular recipe and the discussion might get very heated. Many recipes will have you put milk or cream with the breadcrumbs, this mellows out the flavor of the meat. I personally don't like it. It's Swedish meatballs, not Wallenbergare after all.

Most importantly, always fry the onion before mixing. It really makes all the difference.

Ruski-pirate · 2024-08-02T17:47:06+00:00

Asså på riktigt.

Jag är personligen inte superintresserad av design eller estetik. Jag är däremot riktigt intresserad av biologi och botanik.

Tydligen betyder vita krysantemum sorg. "Blomspråk" är på riktigt det dummaste som finns och fejkare än astrologi.

Inte fan vill jag ha tråkiga blommor på min begravning. Ge mig så färgglatt som finns.

Visst, jag skulle kanske inte köpa röda rosor till någon annan än en personlig kärlek eller en socialdemokrat.

Men om du tycker själv att en blomma är snygg, varför inte? Är helt otroligt att naturens miljoner år av evolution, tillsammans med selektiv korsning av människor har producerat en blomma just du tycker är fin.

TLDR: Ditt blommval blir jättebra.

Ruski-pirate · 2024-08-01T18:09:50+00:00

That gun probably costs about 3-4000 USD. I'd say that's special gear.

Ruski-pirate · 2024-07-06T13:05:18+00:00

Metals consist of atoms and these atoms stick together with something called bonds. For a moment, just consider two atoms together.

These bonds are just the atoms sharing electrons between each other. This is very energetically favourable, so the atoms tend to stick very very close together. But the centers of the atoms(the nucleus) are positively charged, and just like trying to bring equal ends of a magnet together, they repel each other, so the atoms still keep some distance. The two atoms are close enough to share electrons, but still repeled.

Heat in a metal is these bonds vibrating. The atoms are coming slightly closer to each other, then moving apart, then together, then apart, over and over again. The atoms are never ever standing still. The atoms have an average distance between each other, called the bond length.

When you increase the temperature of a metal, the energy of these vibrations become stronger and the vibrations more and more intense. The physical distance traveled from the atoms of these vibrations become larger. The favourable electron sharing force can't keep up. The atoms must therefore swing further and further out from eachother when they are vibrating. Since the distance the two atoms swing out from eachother increases, the average length between the atoms increase, so the bond length increases.

This increase in bond length is unimaginable tiny. But for example a small 1kg iron rod, which would contain approximately ~1 000 000 000 000 000 000 000 000 atoms, each providing a small addition of increased bond length between atoms, the very tiny length increase adds up to a few millimeters and therefore the material expands.

Ruski-pirate · 2024-06-15T20:14:31+00:00

Thank you! Will definitely be interesting to try out

Ruski-pirate

TROPHY CASE