If 48 20ft long tungsten rods exactly 12 inches in diameter were fired in rapid succession to hit strategic points on earth at 80% light speed, how much damage would result? Would it comparable to Hiroshima or more along the lines of Tunguska?
>>8979772
>how much damage would result
93 imperial hectoarcfurlongs
>>8979776
Hmm, let me rephrase that, how much force do you think each tungsten rod would exert on the planet?
>>8979772
495166.746 kg at .8c seems like a world ender
/sci/, do you believe sex/gender is
>fixed? (i.e. can't change during life)
>biological? (i.e. not social/constructed)
>binary? (i.e. not fuzzy/multi-valued/a spectrum)
keep in mind that while these are often treated as one, they are different and may vary independently
They are words that are only and exclusively useful when binary.
Nobody ought to give a shit what you "identify as". What matters is who can fertilize, and who can get fertilized.
The SRY gene is a social construct you fascist
Sex is a biological thing. It can change, theoretically, but odds are it doesn't for any one individual.
Gender is a social construct, it can change, it can be non-binary and while it is influenced by choice, it isn't wholly under the control of the individual.
That said, nobody ought to care about anyone else's gender, or rub their own gender in anyone's face. It's a non-issue and in most cases is simply used as a way to harvest attention from others.
can you be considered "smart" without being interested in math
What about 'sports smarts' like Wayne Gretzsky? Or is that still math since it's applied game theory?
no you fucking brainlet
Is this /g/tard right?
>>8980630
Kinda.
I don't like using math without knowing why it works. But some people like to use math just as a tool, that's okay if you do it right.
>>8980630
Whole modern world functions like this.
Specializations allow it to exist.
If you wanted to learn how to make and operate everything around you, you would never do anything else.
>>8980630
Assembling an ikea shelf doesn't make you a carpenter
>Matter can be neither created nor destroyed.
Then where did the matter come from?
> there isn't any really
>>8980043
>Matter can be neither created nor destroyed.
>Matter
>>8980043
The big Battery!
Human hair. Barbers throw the stuff away or it's donated.
What are practical scientific uses for the hair?
Imagine a city where barbers put their hair in a bin which is then sent to be recycled into other materials. What would the most likely products be? Some kind of keratin-plastics?
It's a weird question but surely there's some scientific applications for all this stuff, right? Humans are growing it on their heads for goodness sake, and it cuts right off.
>>8975613
wigs for cancer patients
>>8975617
What are other uses besides reusing it as hair? Something more practical
>>8975638
It can help clean up oil spills at a pretty impressive rate.
So...just out of curiosity....
We know that when a man and a women make a child, the child would share approx 50% of the fathers dna.
But if the father then impregnates the child. Then any child resulting from that would share approx 75% of the fathers dna.
Therefore, theoretically, is it possible that any child resulting from THAT child would create a literal genetic clone of the father?
>>8981319
it's not a perfect clone, that'S impossible because there is homologous recombination during female meiosis (it creates novel combinations)
but it can come close to one, and this is called a back crossing
>>8981319
it can never be a perfect genetic clone because you lose one set of chromosomes when creating the kid you fuck. so the kid is haploid for your genes, you are diploid for your genes, you fuck, and again, half of the genes from both are lost, including potentially some of your material in the kid.
basically you couldnt accomplish a perfect clone (alleles exactly the same) through this, that's the point of genetic variation advantage of crossing over during meiosis
>>8981327
even with backcrossing, causing the exact allele distribution the father has would be statistically impossible, unless eventually a way is found that allows for chromosomes to segregate with a bias, and we obtain control of that mechanism, and apply it to every gene
I'm in electrophysics this summer and enjoying it, but getting hung up on some of the concepts.
I'm not looking for homework help, but instead I'm curious if anyone has any unique insights or epiphanies to share.
Was there any comparison or explanation of the physics of electricity that made it click especially well for you?
Is there a certain way you like to think about the topic that makes it more intuitive for you?
How easy or how hard do you find the subject to be?
Are there any good books, lectures, youtubers, etc you know of on the topic of electricity in physics?
>>8981242
It's all music anon. Every last bit of it.
Music.
>>8981242
What don't you get?
>>8981257
I'm getting most of it with practice.
The main thing making me stumble is stuff like
>You have a half-circle of charge distribution of radius r
>Its charge is positive in the second quadrant and negative in the first quadrant
>What is the net electric field on a point charge at (0,0)? At (2,0)? at (-3, 3)?
>What net forces result on a positive point charge? A negative point charge?
I can sketch the problem just fine. And I know how the particles react, but converting the sketches to calculus just fucks me.
The charged line, the angle, and the X and Y values all change as you move around the circle. But somehow the infinitesimal changes in theta, x, and y should all balance our, or something? And the changes in charge can be converted from, say, dQ into lamba dL? Where Q is the charge and L is the length of the semi-circle?
I get symmetry. That stuff's cool. I like ignoring half the problem because of canceled forces. And I can solve the integrals after they're constructed.
It's just the construction in the first place that gets me. It's not just in Physics, either. In all of my STEM classes, constructing integrals for anything more complex than "work required to drain a cylindrical tank" is hit-or-miss for me, indicating I conceptually don't get it.
But again, I'm not here for help on a specific problem. Rather, I'd like to think more like someone who KNOWS electrophysics.
Is cyber security a good field to go into?
In America? Yeah it'd be a safe bet if you have connections. Otherwise its just like any other CS degree.
Europe? Absolutely. The EU are getting their shit together and writing up some decent regulations regarding it, so it wont be long until every company with any kind of database needs the skills of an expert.
I was thinking about an active nuclear reactor in space. I came up with a plan for its operation (pic). Since buoyancy isn't applicable outside of acceleration I came up with a hotter burning version of a radiothermic generator. Basically, the 18cm uranium block in the center is surrounded by a vacuum. This means that pressure cannot cause a failure in the exterior. The uranium has holes in its corners to fit carbon shafts and neutron poison injectors. There is a neutron gun and a thermocouple to create the reaction and collect the energy. It is relatively low power compared to an actual reactor however it should provide more power than a RTG.
>>8981154
What about heat dissipation?
Doesn't most RTGs look like they are 90% radiator anyways?
>>8981172
The reactor was designed to operate more efficiently when outside of acceleration. It would operate at meltdown. The Neutron poisons kill the reaction before an acceleration causing it to cool with the thermocouple down to a solid.
>>8981154
If you did this because you think space is colder than earth then kys
Post math that blows your mind.
>the "r" you get from going from cartesian to polar coordinates is just the Jacobian
>>8981113
>the series expansion of 1/(1+x^2) around 1 has a radius of convergence √2 because this is the distance between 1 and the function's nearest singularity (which is at i) when you view x as an element of the complex plane
>if two functions are holomorphic on a connected open set D and the functions are equal on a subset of D that has a limit point inside D, then the functions are equal on the entirety of D
>if f(1/n)=g(1/n) for all n then f=g everywhere
>the value of a holomorphic function at a point is completely determined by averaging the function's values around a random loop enclosing that point
I met up with a 100 year old woman some time ago. We spoke about life and I asked her what she was most thankful for in her life and she answered: my heart. It got me to thinking. How amazing is not this muscular organ. With all the shit that man goes through it can still manage to keep beating for a century.
Anyone with knowledge care to explain how it is possible for a heart to beat for a 100 years. What is this electricity and what are great protips for keeping the heart in great condition.
According to the American Heart Association the heart beats an average of 100,000 times a day -- anywhere from 60 to 100 beats a minute -- which adds up to more than 2.5 billion beats by the time we turn 70-years-old.
>>8981009
it's muscle contractions
>>8981009
>Anyone with knowledge care to explain how it is possible for a heart to beat for a 100 years.
Teenagers always get this wrong. Do you even know what keeps it beating in the first place?
Read up on muscle function and neural signaling. The heart is just a fancy twisted muscle.
I was looking through some of my folders and found this. I think the picture was originally posted on /pol/ last year, and then moved to /sci/. It looks interesting, but no one came to the conclusion of what it was, or if it actually worked. I wonder if anyone can try and figure out what it is now, or maybe try to build it. This is the only archived thread I found discussing it: https://4archive.org/board/sci/thread/8348455
Potholer destroys another denier, hot off the presses
https://www.youtube.com/watch?v=r7aZ6vqCk2E
>>8980815
>2000 years
Nice arbitrary timeline
>>8980849
How does the timeline affect anything?
there is already a Climate Change General
>>8976591
what kind of parametric 3d solids exist?
your mom
If we allow two parameters, we can parameterize the surface of the 3d solid by 1 parameter subgroup of trajectories and consider the second parameter to govern the dilation of this boundary (going from 0 to 1).
https://en.m.wikipedia.org/wiki/Solid_modeling