/sci/ - Science & Math

>>6193343
Please tell me it's a physics course and not a math one./

>Be sitting exam
>small class so exam is in same room as 100 level psychology
>3 hour exam
>university says no one may level in first hour
>1 hour rolls round
>90% of psyc student get up and leave

I just don't get it.

>>5134601

>>5104661
SHE BLINDED ME WITH SCIENCE!

>>4319495
u wot m8

>>4208899
thanks for the pic
>haven't seen many in thermodynamics at all
>mfw

>>4024992
Basically.

^ what hans said.

also, gravity and light both travel at the same speed.

"what keeps electrons from eventually sticking to protons in an atom?"

the force responsible for keeping the nucleus of the atom (protons and neutrons) together is the strong nuclear force. if i understand your question correctly the reason electrons don't fly away from the nucleus of the atom is due to +/- attraction between the electron (-) and the proton (+). neutrons have no charge. as for the reason why the electron does not spiral INTO the nucleus due to these attractions... classical physics has no answer to that particular question. Quantum mechanics however allows us to visualize the electrons around the nucleus to exist in discreet energy packets called quanta. If you've ever seen a diagram for an electron density cloud in a textbook, you'll see that they arrange the cloud in terms of probability that an electron can be found at any one location. i don't pretend to understand QM but it's the world (most likely a supercomputer simulation) we live in.

>>3998470

>Mechanical engineering building on campus
>long packed bike rack
>at least ten of them are fixed gear

>>3885478
the fuck

http://www.youtube.com/watch?v=iklG4sjDj3E
scifags, discuss.

>implying by the time we have the technology to reach it, money will still exist

>psych
>good tier
>mfw

... so jews are supposedly intelligent and you think their owning shit is a conspiracy?

Hello

>How can we expand the Internet to exist as a singular network between multiple planetary bodies
stopped reading there. suggesting OP get pressing problem priorities straightened out.

Where can I find some some detailed information on projections?
The book I'm using just barely covers them.

Define the projection <span class="math">\pi :A \times B \rightarrow A[/spoiler] by <span class="math">\pi (a,b) = a.[/spoiler] Prove or give a counterexample of the following:

<span class="math">\cdot f:A \rightarrow B[/spoiler] is a partial function if and only if <span class="math">\pi : f \rightarrow A[/spoiler] is injective.
<span class="math">\cdot f:A \rightarrow B[/spoiler] is a function if and only if <span class="math">\pi : f \rightarrow A[/spoiler] is bijective.
<span class="math">\cdot f:A \rightarrow B[/spoiler] is injective if and only if <span class="math">f[/spoiler] has a left inverse
<span class="math">\cdot f:A \rightarrow B[/spoiler] is surjective if and only if <span class="math">f[/spoiler] has a right inverse

ITT hopeless dreamers think that their table top assembler can create diamond when you need at least a 200ton press to create the proper P/T space under which diamond can be formed.

An nanoscopic assembler is only really good for making small components anyway not macroscopic products. It takes less energy to just make the tiny components and then fit them together with regular machining.

Also you have to have very pure slurries of molecules to feed into the machine otherwise the excess unusable material will gum up the works by creating an environment were less than 50% of the molecules in the machine can attach to the tool tips of the assembler apparatuses and the unusable stuff becomes concentrated where ever the tool tips are supposed to be uptaking the component molecules.

>>2681971
>>2681977

>>2679502
Seems to have been a pretty safe bet so far.

You gonna step up and prove him wrong?

Oh wait, you can't. Because your life is based on lies. Must suck to realize the world isn't as magical as you want to believe.