Anonymous
Now that gravity waves have been discovered 2016-02-11 17:29:54 Post No.7851509
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Now that gravity waves have been discovered 2016-02-11 17:29:54 Post No.7851509
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Now that gravity waves have been discovered
Anonymous
2016-02-11 17:29:54
Post No. 7851509
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how long before some genius invents the warp drive?
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Or detect gravity distortions by passing aliens.
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>>7851509
>muh beaner drive
enjoy blasting your destination with retardedly powerful em
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>>7851533
not really. the ship merely has to discharge the em in sequential decelerating steps
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>mfw I'm smart AND I could knock the fuck out of most people on the planet
Feels good man. Get on my level dweebs.
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>>7851470
/brit/, pls go.
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>>7851470
But are you cute?
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>>7851596
Yep, good looking too.
And 6'4.
Anonymous
Space Colonising & Exoplanets 2016-02-11 17:13:42 Post No.7851440
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Space Colonising & Exoplanets 2016-02-11 17:13:42 Post No.7851440
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Space Colonising & Exoplanets
Anonymous
2016-02-11 17:13:42
Post No. 7851440
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Dear /sci/,
I have a bunch of questions about space and human colonisation. If you could answer or point me to sources, I'd appreciate.
Here's for starters:
>how much is needed to terraform a planet
>can a geologically dead planet be "rebooted" somehow, and how is a dead planet a problem
>could we ever live on Venus
I have many others and will be sure to ask more on what you answer me, if anyone feels like it.
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>>7851440
>how much is needed to terraform a planet
a lot.
>can a geologically dead planet be "rebooted" somehow, and how is a dead planet a problem
no.
>could we ever live on Venus
no.
If you anymore questions, please do not hesitate to ask :-)
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>>7851446
>and how is a dead planet a problem
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New questions:
What's the fastest way to terraform a planet? Suppose you have to make up stuff, à la sci-fi, what would you do?
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>mfw americans spend billions of dolalrs to make a giant detector to prove that gravity can bend space when all they had to do was make some coffee and stir it
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>>7851164
kek
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>>7851164
kek
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>>7851164
looks like ur mums butthole m8
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ITS HAPPENING
https://www.youtube.com/watch?v=c7293kAiPZw
where were you when gravitational waves were confirmed?
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>>7850896
NOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO!!!!!!!!!!!!
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>>7850896
>where were you when gravitational waves were confirmed?
Well last time I was taking a dump, coincidentally I was also taking a dump when it was announced that the majority of the signal they detected was likely just dust. This time I'll probably be on 4chan, but I'm going to try and keep the tradition going and be taking a shit when they announce this one as well.
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>>7850896
the lady is spoiling the shit out of this with her smiles.
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Why do so many people who barely passed high school science, or people who are experts in a completely different field, always have an opinion of things they literally do not have the framework to understand?
The average climate change denier or flat earther does not have the base of knowledge required to even begin to engage with the topic.
Why can't people just say "I don't know" and keep their mouths shut?
T. An engineering student that keeps his mouth shut about biology, chemistry, climatology, etc.
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do you think the average climate change supporter has the base of knowledge required to even begin to engage with the topic?
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>>7850881
Their new age priests have imbued them with the powa of the AGW carbon rationing Gods!
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You might be allegedly smart on scientific topics but you are dumb as fuck when it comes to human psychology 101.
It's simply the fact that humans want attention and valdation. A natural and easy way to achieve that is to tap into the social conscious and project an image of being knowledgeable on a hot button topic.. the kind of topics that get gullible people on board and hothead idiots like you woynd.. so that the topic stats relevant. To them it doesn't matter if they are right about something or not, as long as people are paying attention to them when they spout their inane trash.
Get an education retard.
Anonymous
Treadmill physics question 2016-02-11 15:02:51 Post No.7850838
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Treadmill physics question 2016-02-11 15:02:51 Post No.7850838
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Treadmill physics question
Anonymous
2016-02-11 15:02:51
Post No. 7850838
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Many people on the internet claim that running on a treadmill requires the same amount of exertion as running on solid ground.
However, I don't think that this assertion is supported by physics.
First, I'd like you to consider what happens if you were to drop a runner directly on to a treadmill.
If he was already moving his legs at the exact right speed, (very difficult in practice, but bear with me), he would simply run, stationary in relation to the treadmill, just as if he'd been running on it the whole time.
Now imagine dropping a runner onto solid ground.
He would not immediately take off at speed, but would have to accelerate up to speed, right?
So some fundamental difference must exist somewhere.
Now look at the very basic force diagram I made. (Emphasis on very)
It's canceling out/ignoring a lot of small details, and focusing only on what moves the body forward.
A more simplified example of this problem might be to imagine a simple block with a rocket attached to it or something.
In fact, that would probably be a better example of what I'm asking, but I digress.
Now lets move on and compare the two runners as they're already in motion, as shown in my diagram.
On the treadmill, the body is being pushed back by a force coming from the treadmill.
Since you are remaining stationary on the treadmill, (not accelerating), you are applying an equal and opposite force back against it.
On solid ground, the only force pushing against you is wind resistance. (Remember, we're ignoring things like friction against your foot in both cases for the purposes of this question)
So therefore, all you have to overcome to maintain a constant speed is wind resistance.
If that's the case, then running on a treadmill vs solid ground are actually two very different things.
What do you guys think?
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Makes sense to me.
What friction are you ignoring though?
Because the treadmill applies its force through friction.
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We can't just ignore friction (and I don't see why you'd want to). If the treadmill has better grip you will use less energy. If the ground has better grip the opposite is true. Now I don't think most treadmills have poor grip. It's a core feature.
The only reason I can see running outside would be easier is if you have the wind in your back.
And if we're just considering how exhausted you get often if you run outside you need to adjust the angle of your feet, which is energy you output. There's also the additional inefficiency of climbing steep hills and going down hills.
I'd say treadmills are far easier to run on, at least here in the woods.
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>>7850864
Well, yeah. The foot is also applying its force through friction.
What I meant was, I'm ignoring any friction that doesn't contribute to the lateral movement of the foot, since we're only focused on lateral movement.
Such friction would be rather small, anyway.
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>A different definition involves what Terry Tao refers to as ultralimit, i.e., the equivalence class [(0.9, 0.99, 0.999, …)] of this sequence in the ultrapower construction, which is a number that falls short of 1 by an infinitesimal amount.
Can we now finally admit that .999... != 1?
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.999...! isn't a number that falls short of 1 by an infinitesimal amount.
It's just a representation of a number, in this case, 1.
.333...! represents 1/3
.666...! represents 2/3
.999...! represents 3/3 or 1
If you argue that .999...! isn't 1,
then you have to argue that .333...! doesn't equal 1/3.
Which is stupid, because .333...! is a commonly agreed upon way to represent 1/3 in decimal form.
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>>7850796
>Which is stupid, because .333...! is a commonly agreed upon way to represent 1/3 in decimal form.
But the question isn't whether we agree to let it represent 1/3, the question is whether it -is- 1/3.
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>>7850801
You can't play this game in math.
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Is gif related accurate?
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>>7850715
more or less, everything is vibrating crazy fast, it wouldn't be so clear if you were shrunk down trying to observe that.
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>>7850726
How do you know it's kinesin?
Anonymous
I hope LIGO gravitational waves are not discovered today 2016-02-11 13:25:05 Post No.7850703
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I hope LIGO gravitational waves are not discovered today 2016-02-11 13:25:05 Post No.7850703
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I hope LIGO gravitational waves are not discovered today
Anonymous
2016-02-11 13:25:05
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I don't want them to prove that FTL is impossible and that we're going to be stuck on this shitty planet and solar system forever.
No... i just cannot accept it. There must be another way...
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>>7850703
wut
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>>7850703
>FTL is impossible
>stuck on this shitty planet and solar system forever
One has nothing to do with the other. Fuck off.
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>>7850776
Scientists are saying gravity travels at speed of light. If thats true
>no Alcubierre warp drive
>no wormholes
>no FTL travel
>stuck on this shitty planet forever
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>win spelling bee
>be considered "smart"
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>>7850669
Op can't spell
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>>7850669
Well people who can't spell are more likely to be stupid, so there's that. If you don't understand the language you speak, you're also not very likely to be able to grasp the intricacies of mathematics and science.
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>americans
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>Einstein failed his math exams many times in school
Why does this myth persist?
Is it spread false hope that "anyone can do math if they try hard enough"?
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>>7850595
Do you have autism?
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>>7850597
Yes
The kind that makes me smurt
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>>7850610
Fuck off and stop polluting this board with trash threads
Anonymous
Mathematics problem sums with solutions? 2016-02-11 11:02:27 Post No.7850567
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Mathematics problem sums with solutions? 2016-02-11 11:02:27 Post No.7850567
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Mathematics problem sums with solutions?
Anonymous
2016-02-11 11:02:27
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Where can I find good Mathematics problem sums with solutions provided? My school always provides me with questions and answers only and have to make a long trip to visit the TA or professor whenever i need help which would have been saved if the solution was provided. Thanks for the help.
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Maths Quest's Maths C for Queensland year 11 and 12 have some of pic related. Particularly year 11, if I remember my high school years correctly. They were my favourite textbooks.
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>>7850575
I need Calc 2 shit like integration by parts and polar coordinates.
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>>7850567
bump
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little disclaimer here:
i don't know english well, so don't kill me instantly)
problem:
please help me to understand
- imaginary unit
- complex numbers
- quaternions
for what these imaginary units are made?
complex numbers are just vectors?
and quaternions... so difficult) why they have 4-dimensional unit to explain 3d rotation.
very want to uderstand this. very,very)
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>for what these imaginary units are made
Many mathematical problems become a whole lot easier in the complex plane.
Quaternions are useless poser shit though.
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>>7850546
can you present me these problems?
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>>7850544
Read a book
Any math geeks here? Is pic related true?
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>>7850520
The odds are certainty.
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>>7850520
The probability of finding your mom is meaningless, you'd be born no matter what, just with a different mom or dad or both. Same thing with the sperm.
It is interesting though, because we're tiny specs on a small rock in a limitless universe, with infinite parallel universes (if the universe is infinitely large). We're also tiny on the time scale, with a lifespan of 70 years on an infinite time scale.
It gives me existential feels, knowing that we have only 70 years to exist on a tiny planet, and yet we consider it to be worth something. There's something beautiful in the existence of humanity, something so essentially meaningless but still causing great joy, sadness, anger, and love to the beings who experience the human life.
Almost makes me wanna smoke weed or something.
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>A man sees a leaf fall in the forest without making any predictions of where it will land
>It lands in a particular spot
>The man then points at the leaf and calls it a miracle that defies astronomical odds