/sci/ - Science & Math

It's been a few months since I dipped my head into the spaceflight sphere, can I get a quick rundown on current events?

Every newborn has between 50-70 de novo mutations in his genome, mainly depending on the age of the father at conception.

2% of the human genome coding dna, but the total portion of the genome wich is subject to purifying selection is something like 5-10% of the total.

It follows that around 5-10% of those new mutation per newborn human have an effect on fitness, with the vast majority of them being deleterious (even if many of those very lightly so i. e. being a redhead or mild myopia).

Now, to maintain fitness in a population every deleterious mutation must be eventually eliminate from the gene pool through the disadvantage in fitness that its carriers have.
But I don't see how a species with such high intergenerational time and that produces quite a limited number of offspring could ever do so. 5% of 50 gives us 2.5 deleterious mutation per newborn. An unreasonably high percentage of people should fail to reproduce and women should have tons of kids for fitness not to decrease.
I read a paper by Michael Lynch that calculated at 5% the per generation loss of fitness of humans due to de novo mutations (I will post it if I find it).That's a lot.
Am I missing something in all of this?

>>11483768
>you'd have to be an idiot to take a fasttracked vaccine otherwise

Isn't math a science?

>>11200968
Reminder that not one person in this thread knows the first thing about string theory.

Do you know how to calculate the open-string tachyon scattering amplitude (in principle at least)?

If you can't answer that, or don't know what it means, you have no clue what string theory actually means, and so your 'opinion' on it is pure bullshit

Daily reminder to stop talking out your ass about a topic you know nothing about. Instead of fooling yourself you are smart, you could shut up and read the other posts and ask questions. Maybe you'd actually learn something.

If you do not pass the following requirements, do not post in the associated thread. If you do pass the requirements and have some fringe crackpot view, okay then you are allowed to shit up the thread with it. No favoritism here.

Please do not post on the associated topic if you can not at least answer the question below

>entropy
What is a partition function?

>special relativity
How do you do a Lorentz transformation on an electromagnetic tensor?

>Is quantum mechanics bullshit?
What is electronic band structure?

>Space-time and extra dimensions
What is a metric?

>General relativity
What is a Christoffel connection coefficient?

>Cosmology and the big bang
How do you solve the Friedmann equations for a matter dominated universe?

>Black holes
What is a Penrose diagram?

>Quarks and gluons
What is the Lagrangian for a non-Abelian gauge theory?

>String theory
What is the central charge?

Daily reminder to stop talking out your ass about a topic you know nothing about. Instead of fooling yourself you are smart, you could shut up and read the other posts and ask questions. Maybe you'd actually learn something.

If you do not pass the following requirements, do not post in the associated thread. If you do pass the requirements and have some fringe crackpot view, okay then you are allowed to shit up the thread with it. No favoritism here.

Please do not post on the associated topic if you can not at least answer the question below

>entropy
What is a partition function?

>special relativity
How do you do a Lorentz transformation on an electromagnetic tensor?

>Is quantum mechanics bullshit?
What is electronic band structure?

>Space-time and extra dimensions
What is a metric?

>General relativity
What is a Christoffel connection coefficient?

>Cosmology and the big bang
How do you solve the Friedmann equations for a matter dominated universe

>Black holes
What is a Penrose diagram?

>Quarks and gluons
What is the Lagrangian for a non-Abelian gauge theory?

>String theory
What is the central charge?

I have curly hair, If i were to impregnate an asian woman with super straight hair would our daughters turn out having straight hair?

>>10975578
I dont know

>there are no absolute points in space, only reference points
>the speed of light is finite
It seems to me that the the fact that there is an absolute speed limit clearly means that you can be absolutely still in space. So why don't we just use the speed of light as an objective measure for space? I mean how about we just say an absolute point in space is a point from which you need to accelerate by 299.792.458 m/s in any direction to move at c?
Or does that not count as objective because it's requires c as a reference?

>>9952598
>being good at math is mutually exclusive with deviant sexual preferences!!
if you get hired at NASA you get hired because you're good at what you do you fucking rock head. color me triggered. i entered law over stem because faggots like you give me brain damage, and i hate her likewise all the same.

Is it safe to take an eternal combustion engine to crack hydrogen and then feed that hydrogen into the eternal combustion engine?

Would this provide more efficient systems?

>>9724527
Maybe he dosn`t mean IQ. Iq could be some acronym for some other shit, written that way to make clear that it isn`t IQ.

>>9594951
>dilution fridge

>>9466945
>>9466971
how does gravity affect light then?

>>9187759
>one of the best and most prolific mathematicians of recent times
>his autism would hinder him from doing mathematics

>>9165866
Stupid question thread

>>9100362
what is it

so electrons, other elementary particles etc. are completely identical from one another right? it is not possible to distinguish an electron from another one positioned somewhere else in space.
does that imply the oxygen molecules i breath in are also everyone else's at the same time?

>this isn't a partisan or political issue
>btw fuck that nazi Trump

if you have group A = {a, b, c, e}
you know e is neutral, all members are different, it has associativity and closure.
also (a*a)*a = b

is b*a = b not possible inherently because a can't be neutral?

or is there something else that implies it's not possible?

>>8353329
>Evolution works on the level of the individual you moron
What did he mean by this?

>>8348618
>fusion reactions

>>8318126
>CS programming project
>get assigned into group
>everyone is competent and motivated
>everyone works pretty damn hard and contributes their own unique, irreplaceable value to the project
>get the highest marks in the class
>our group becomes tight-knit af, always having very productive study sessions together from that point on
What happened, /sci/?

Did I just luck out?