Isolation for long space missions

Hi,
so I was watching Michael Stevens’s first and only free episode of Mind Field where he was talking about isolation. He mentioned that there were experiments of people in closed systems to test how body and mind reacts to long term isolation.


In 1989 Stefania Follini was for 130 days in a cave without any visitors, she could only communicate via “internet”. She also had books to read and some small animals like mice. Her menstruation stopped at some point, she slept for about 10 hours and was awake for 20-25! Also during the visit she lost 7.7 kilograms. This is not the longest isolation at all.

NASA also did in the last few years isolation of 6 people for 8 and later 12 months. This was to test the team work of the people since they were closed together cabin fever showed up, but they did not have to cancel the mission. In 2007 Russians did experiment called Mars 500 where six males stayed together for even longet rime, 520 days, only artificial light as before, they brought with them books and games or dvds but they had limited connection with outside world.

https://www.nasa.gov/sites/default/files/thumbnails/image/hiseasgroup-uhi.jpg

Eight months in “cabin” (project HI-SEAS)

Michael Stevens on the other hand spent “only” 3 days in isolation, but it was a bit different. He was in soundproof small room with white walls, white and black bottles with food and water, sink and toilet. This had dramatically different effects. He had halucinations and could not really tell apart dream from reality, also at one point he was counting bottles and counted 6 instead of 9 😀

What are such experiments for? You want to know what happens to body if it is thrown out of its rhytm and mind too. When we are finally able to get to Mars we need people that are capable of staying in small spaceship for months and months.

Dragallur

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How big really is the new prime?

Hi,
it has been few weeks/days since the last prime was found. It was a huge boom since it happens less and less often as the prime increases and we are getting to even bigger numbers. How big this number actually is? Well in this post I will try to show it, and it is really huge.


I heard some great analogies to 52! (factorial) which is pretty big number. What I decided to do is to do the same thing with the new prime, but oops, this number is way too big.

This is the number which has been found: 274,207,281

It has 22,338,618 million digits, which is way too high to tell you something.


Now imagine that you are counting, every second you add one. How long time would it take you to get to this number? Long time.

More accurately since that is very relative: 6.80348129009742 × 1022338599

This many times of Universes, roughly. What? The number did not even change! Actually there is like 19 less digits.. still not quite good.

So I started to do those analogies for the time written above.

Ok you have a normal can of coca-cola. Such a can has about 330 milliliters. One drop of water (that is actually SI unit) has 0.05 ml. This means that if you would fill it with the rate of one drop per second you would fill it in 6,600 seconds which means almost two hours.

On height, one can has 0.000122 kilometers. Now imagine that if you would fill it you would then put it on one another. You would rise this tower of cans to the height of Sun, that is 150,000,000 kilometers. With filling each of these cans it would take you about 8 trillion seconds [1], this is roughly 253,678 years.

Then you would destroy such tower and take one drop (0.05 ml) from the Atlantic ocean. Atlantic ocean has volume of 323.6 million of cube kilometers. Before you would take another drop of water from the Atlantic you would have to create this tower again.

It would take you about 1.6 sextillion of years to do this thing [2].

Now imagine that after emptying whole Atlantic ocean, you would fill it again (immediately) but you would take one atom from your body (imagine that your body does not change). Then you would fill those cans, stack them to the sun, do that so many times that you would empty Atlantic ocean and do that so many times that you would actually move all atoms from your body to some different place (there are 7*1027 atoms in your body). Too bad, this would take you only 1.2*1049 years.

When I did those analogies I did not really thought about how big the number was going to be so I was a bit dissapointed, at the same time I realised that the prime number is whole next level and I could equal it only with another monstrosity.

Imagine doing all the previous steps and then arranging 3,900,000 numbers into one row. There are 3900000! combinations and you would do all of them, but between each step you would have to do all the previous. Roughly such a thing would take you the same time as counting by one every second to get to the new prime number.

Thanks for reading!
Dragallur

[1]8 trillion is 8,000,000,000,000
[2]1.6 sixtillion is 1,600,000,000,000,000,000,000

If you really want to see the source of the image: here.

 

Why can not we travel faster than light?

Hi,
today I will write just a fun post about why we can not travel faster than light (even then it is desirable… as is written on mathbloggers cool blog: https://mathblogger101.wordpress.com/ ).

So there are some things that will start to happen when you go really fast.
First of all I would like to say that speed cannot be added because it would couse some trouble (like putting headlight of your car ON while driving).
There is simple equation which you can find on internet which says how speeds works when you are “adding” them.
Well another thing is that stuff is gaining mass while it goes faster but there is some effect only in higher speeds. (Athlete girls should not check their weight while running, they could be disappointed.)
It is exponential so you would need to give infinite amount of energy to system to get that speed, which would release infinite amount of heat and that would destroy everything, you just can not take that much of coal.
There is also another problem about which you maybe did not know.
Because this is electromagnetism whem moving around. If you read that post about EM you know that electromagnetic force carrier is photon.
What is the speed of photon? 300 000km/s
That means that photon which is responsible for your moving can not move you faster than it is traveling!
I will not be able to run faster with bricks for building if my maximal speed is 2m/s.

VSauce1 made a awesome point of what would happen with car traveling at speed of light and pushing its headlights on. If you know what is Doppler effect you can come up with the answer really quickly.. It is that WWWWŽŽŽŽŽMMMM of train or car traveling towards and than away from you but with sound. Same thing would happen to car at speed of light. For passenger inside nothing would happen, time would not happen because nothing like lenght which can travel light in one second would not happen for him because from his view light would not move any distance in one second…

Dragallur
PS: if you know about any reason why speed of light is 300 000km/s let me know because I dont