Archived threads in /sci/ - Science & Math - 1985. page

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>>7783911
Dream Chaser had originally lost the crew contract to SpaceX and Boeing CST-100 (now called SpaceLiner). Now it will be repurposed for cargo delivery and low-stress return, due to its high lift gliding return profile.

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>>7783922
The Dream Chaser is the culmination of almost forty years of design and refinement, starting from the HL-20 lifting body design. It will be great to see it get off the drawing board!

It already had a successful glide test, with another coming up shortly. The first orbital test launch will be sometime in 2017-18, now that funding is coming in again.

well that's cool OP

its just too far away to give a shit

>>7783920
>its just too far away for monkeys to give a shit
FTFY

>>7783901
Neither of those can be male or female, they're markings on a piece of paper

>>7783901
2
saitama

2, because its 'fatter' or less delicate

Let z = a + i b

[eqn] \frac{1}{1 - (a + ib)^4} = \frac{1}{1 - (a + ib)^4} \frac{1 - (a - ib)^4}{1 - (a - ib)^4} = \ldots [/eqn]
You should be able to do the rest.

[eqn] z^4 = e^{i4x} [/eqn]


[eqn] \frac{1}{1 - z^4} = \frac{1}{1 - e^{i4x}} \frac{1 - e^{-i4x}}{1 - e^{-i4x}} = \frac{1 - \cos(4x) + i \sin(4x)}{2 - 2 \cos(4x)} [/eqn]
[eqn] \Re \left( \frac{1}{1 - z^4} \right) = \frac{1}{2} [/eqn]

>>7783887

Since [math]|z|=1, {\bar z}=1/z.[/math] Let [math] w=1/(1-z^4).[/math] Then [math] Re(w)=(w+{\bar w})/2=(1/(1-z^4)+1/(1-1/z^4))/2 = 1/2. [/math]

>>7783885
Memerium

>>7783885
al-yoo-mini-um

>>7783885
Aluminium.

See that extra 'I' there, Americans? It's not 'Al-oo-minum', it's 'Al-yoo-minium.' Retards.

>>7783867
you got 10 minutes sci/ go

>>7783867
>>/hm/
is the place for homework

they usually answer pretty fast

>>7783870
Oh thank you I'm new to 4chan

>>7783839

Why on earth do you need your maths teachers help? Just do everything yourself and use the internet. High school math isn't difficult.

>>7783847
I still need his help for stuff, anon. Sometimes the book doesn't explain a concept well enough, or else I get stuck on a past exam paper question.

I'm getting really sick of the 'laugh joke' thing. I put on a front that I'm enjoying it (though I do genuinely laugh once in awhile), but I'm too nervous/scared to say anything.

I don't know what to do.

>>7783856

I N T E R N E T

there is no maths topic/concept up to the standard first 2 years of grad school that can't be looked up on the internet

>>7783785
Yes. https://www.youtube.com/watch?v=k2T45r5G3kA

>>7783785
Def smarter than /sci/ desu senpai

>>7783808
that guy is kill already.

Eels are cool.

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electrocytes...

>>7783738
>Will it create a magnetic field?
[math]\nabla \times \vec{B} = \mu_0 \epsilon_0 \frac{d\vec{E}}{dt}[/math] for source-free Maxwell, so yes.

>Microwaves?
Depends on the frequency of the discharge.

>>7783735
Repeat after me: Rie-mann

benus

>>7783711
I saw some data like this while I was at mit, email the stats dept and they will get it to you, probably

>>7783721

Interesting. For what subject? Can you remember some of the outliers (both low and high)? I'm very interested in seeing the outliers. It will greatly satisfy my autism.

>>7783708
Building a SSTO Spaceplane is absurdly difficult and the development costs are more than anyone has cared to pay.

stay tuned my friend :^) NASA basically confirmed the working mechanisms of the EM drive which allows us to travel to Mars in 17 minutes with multi-dimensional wormholes that are fueled by Qualia consciousness gems.

tl dr : Rocket fuel is the most efficient and feasible way to get a fuckton of stuff up to space.

>>7783713
Why not to use airplanes with rocket propulsion? Wouldn't the lift reduce fuel expenses?

You need to use the following equations:

[math] E = \frac{{hc}}{\lambda }[/math]
[math] E = m{c^2} [/math]
[math] p = mv [/math]
[math] \Delta x\Delta p \geqslant \frac{\hbar }{2} [/math]

>>7783565
Nah dude you got this.

>>7783565
Pretty heavy schedule, but definitely doable if you focus.

>>7783565
>is this hard???

I don't know what you're expecting to hear. It definitely depends on you, bro. Are you willing to put in the effort required in these classes?

You can always make it feel softer if you study some of it right now so you get with the intuition in place. Try http://ocw.mit.edu/courses/ocw-scholar/

fuck you guys :(

>>7784779
>and i cant afford to buy any books.
bookzz.org

>id elements by spectra
Atomic absorption spectroscopy or atomic emission spectroscopy

>>7783539
Here you go, everything you could ever want to know about the behavior of electrons and photons.

[math] \int {\mathcal{D}\psi \mathcal{D}{A_\mu }} \exp \left( {i\int {{d^4}x\left[ {\bar \psi \left( {i\not D - m} \right)\psi - \frac{1}{4}{F_{\mu \nu }}{F^{\mu \nu }}} \right]} } \right) [/math]