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Archived threads in /sci/ - Science & Math - 115. page
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This is not a troll thread I obviously accept evolution as true however I have a question about it.

Over all of the history of earth and life on it wouldn't there have to have been an animal (obviously many but for purposes of question let's say one) an animal who never set foot on land but had a child that did?

I mean the very first lifeform that walked out of the ocean had a mother and father. What kind of animal was this?

If we put cameras on all the worlds shorelines and recorded them for a million years would we see an example of this happening?...
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>>7780081
... amphibians?
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>>7780081
>Say we killed all human activity in Africa and recorded the whole continent for tens and millions of years. Would humans eventually be evolved again on that continent?
No because the climate changed, also there's no reason to develop a large brain there anymore so it would never happen
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>>7780081
>If we put cameras on all the worlds shorelines and recorded them for a million years would we see an example of this happening?

I doubt it. When animals first came on land, there was an uninhabited ecological system to saturate. Now there are plenty of land based forms and amphibians already.

I don't even know when the last time was something walked out of water and became land based.

>Would humans evantually be evolved again on that...

I shoulder this shotgun and shoot a deer with a slug. Strangely, the stock tapers to a point that's roughly 12 gauge.

The slug tears through the deers central cavity destroying the heart, lungs, and bones around it.. killing it quickly.

My shoulder doesn't even get bruised.

Fuck you, Newton. And fuck your laws.
>>
The entire gun's mass has to be accelerated by the recoil, and since it is much larger than the bullet, it is accordingly accelerated much less.

That being said, I think it probably would bruise you. I've known people to get bruises from firing guns with entirely unmodified stocks, especially guns and relatively powerful cartridge configurations
>>
I'm pretty sure you're supposed to attach an actual stock to that pointy part.
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>>7780026

OP here I'll admit shooting that thing would SUCK.

But if it was shouldered on the most fleshy area, it would not bruise. Unless you're prone to bruising.

It would still hurt.

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Learning from textbooks or learning from open courseware (such as MIT's proper courseware)

Which is better?
>>
inventing your own methods like a fucking genius instead of being some fuckboy lapping up the genius of others
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>>7779993
Textbooks
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>>7780008
This. If you can't independently derive the laws of motion and thermodynamics and quantum mechanics using nothing but a 1kg block and the Calculus, you'll never get anywhere in science.

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Wtf kind of equation accomplishes it achievable to allow you be incur the evaluation of the inquisition "does the Macrocosm subsist"?
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>>7779987

Are you retarded?
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>>7779997
can you provide a smart riposte of my inqusition sir
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>>7779987
Remember when your teacher said there is now such thing as a dumb question? Well you seemed to have proven her wrong.

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>>7779973
Bretty gud, OP.
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>>7779973
Saving, good shit
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>shit never brokes

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Any male nurses or male nurse students? I'm choosing nursing for the money. I do have compassion for others, but I don't know if i'll like being a nurse. I will like a median salary of 63k. I will like being done with school after an 18 month program. I will like tuition reimbursement to get my bachelors.

My end goal is not to do nursing all my life. My goal is to make and save as much as possible and get back into business. I am an entrepreneur at heart, but the realist in me says I wont be able to secure a business loan unless i'm making good money already.
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I hear its hard as fuck to get in because med students use the faculty of nursing to take their science courses. It's a high paying job and hell you will meet a lot more bitches than the engineers.
>>
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>>7779969
>choosing nurse for money
>not choosing nurse for unlimited supply of liberated female med students

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Why are they so smexy?
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>>7779956
Can't they just realize that 'mushroom' tetration is a thing?

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So I am in CP Biology and am currently learning about egg cells.
I have a question for /sci/
Can I reproduce with a flower by cumming on it? Will the sperm sink into the eggs?
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>>7779934
What is your skin color and what flower are you tring to impregnate?
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>>7779946
skin color is a social construct

fuck off racist
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>>7779946
I am white (mostly of welsh descent) and i will try to impregnate any flowers that will work

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... the Spice must flow!
new NASA images:
http://www.jpl.nasa.gov/spaceimages/details.php?id=PIA20193
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>>7779915
Looks like cracks with stuff falling into them.
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>>7779915
Hope you're wright
>>
> see some lines that can be made by a thousand geological thing
> sandworms on ceres !!!

git the fuck out

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Why couldn't our universe exist in a black hole
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>>7779903

It does.
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>>7779910
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Because black holes are a meme and don't actually exist.

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"If anyone still wants to debate the viability of the scientific arguments regarding climate change, have at it."
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You can quickly spot bad science when its adherents are extremely arrogant.
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>>7779914
"Evolution is just a theory!"
"Gravity is just a theory!"
"The conservation of momentum is just a theory!"

Right... Totally an one sided thing there.
>>

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Hey /sci/,

Name a single good textbook published by Pearson, I fucking dare you to try.

Hint: There are none
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>>7779877

Algebra by Artin
Linear Algebra by Friedberg, Insel, and Spence
Applied Partial Differential Equations by Haberman
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>>7779877
Pretty sure they have published Spacetime and Geometry by Carroll.
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Really any Giancoli physics text is pretty good, despite the shekel grubbing at Pearson

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>A spaceship traveling exactly at the speed of light jettisons a smaller craft ahead of it from the front of the ship

Would the larger ship be pushed back or would the smaller craft not move forward at all?
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you cant move at the speed of light so the question is void

>but what if the spacecraft was 1 m/s less than the speed of light and shot a spacecraft out at 2 m/s

what is time dilation
what is relativity
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>>7779845
Everything is relative. So to observes on both ships, who are not travelling at light speed relative to each other, everything behaves normally.

>>
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>>7779849
yup.

Meaning: You are jettisoning the craft forward meaning the added bonus of moving it forward from your light speed craft it would be going just slightly faster adding the momentum to put it out the front docking bay.... if the Craft slows down slightly it will hit the ship behind.. so generally a good idea to speed up out of it and away from the other ship...................

Yes you can.>>7779847

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>mfw pure math autists give me shit for taking biochemistry
>hurr it's an easy science

Half you sperglords would fail the class
>>
And you would fail out of any higher level mathematics autism course, or physics, or engineering or...

Different bases of knowledge. We need biochem fags to discover meds, and shit, just like we need pure math to sperg out and make mathematics that may one day have an application.

As long as you aren't shit at what you do, and you aren't being an autistic biofag doing work that has no medical purpose, then you are doing good work.
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>>7779848

>reasonable way of thinking

How have mods not banned you yet?

Btw OP chemistry is just applied physics, enjoy your babby degree (^:
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>>7779863
Except unfortunately for physicists, employers don't see it that way, and actual chemists have both the breadth and depth of their field that can only reasonably achieved from specialization. It would be nice if physicists could go into fields that are "applied physics", but the whole not specializing in it is a turn off for employers.

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Consider an ${\mathcal L}^2$-integrable function $f : {\mathbb R} \to {\mathbb C}$ with

$\int |f'(x)|^2 \ dx$

finite.

How does the above integral stand in relation to

$\int |f'(x)| \ dx$

?

E.g. are there some some standard inequalities relation them?
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>>7779799
let f(x)=ln|x| for |x|>1 f(x)=1/2*x^2 - 1/2 for |x|<1
∫ |f'|^2 is finite
∫ |f'| is infinite
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>>7779799