/sci/ - Science & Math

What is the largest number that can be written in a 4chan post given the 2000 character limit? Digits are allowed, as are an unlimited number of exponentials (^), factorials (!), and multiplication/division/subtraction/addition, parenthesis, etc. However, non-integer symbols denoting numbers (for example, pi and e, any symbol for Graham's number, etc) are not allowed.

At first I thought it would be a repetition of 9^9^9... for all 2000 characters. Then I realized that 9^9999... would be larger. But what if the exponentiation was doubled up? 9^(9^99999999999999999)). Surely that would be larger yet. So then should it be a repetition of 9^(9^(9^(9^...)))? But then factorials could perhaps make it even larger. 9!^(9!^(9^!...)).

So what is it /sci/?

A low-lead paint contains 0.5% lead per unit weight, and loses 60% of its weight when dried.

An 11kg child chews on this dried paint. What mass of DRIED paint must the child eat to have 6micrograms/kg of lead in its body?

What is two thirds of three fourths?

is Chemistry with Molecular Physics offered by Imperial College the true Master Degree? What can be more /sci/-approved than Math, Physics and Chemistry?

How easy is it to hook up with girls in a calculus or quantum mechanics class?

Hey /sci/,

I was pondering the use of alkaline batteries as a source of manganese dioxide but my question is,

Is that manganese dioxide arleady activated or not?

During engineering calculations (on the loooow level mind you) the teacher wanted talk about and illustrate potential energy and gravity. He made a drawing of earth with a tunnel through and we had a funny chat about how a thing dropped in the tunnel would act.
Then I ask:

>does gravity travel at the speed of light too?
>u wot m8
>if the sun disappeared it would be dark on earth after 8 minutes but would earth go into free fall after the 8 minutes too or before?
>LOL ANUN DAT SUM PHILO SHIT RIGHT THUR

And they laughed.
Can anyone in here answer my question?

>>4810579
>thinks a circle has an edge

<span class="math"> Prove that H^s \hookrightarrow \mathcal{C^r} \quad r = s-\frac{d}{2}>0[/spoiler]

x^2 / (x^2 +1) I would say = x^2/x^2 + x^2/1 = 1+x^2

BUT

it's actually 1 - 1/(x^2+1)

DAFUQ!?

please explain why my shit doesn't work out. also flame if you deem it necessary

friend of mine sent this to me, what is the solution for gods sake?
There is 25 student in the class, 15 of them are girls.
What is the probability of choosing 6 random students that are only girls.

this thread

>>4172872

>The old /sci/ raff/ruse threads
>The /sci/duck
>When they first posted the video "Steven Hawkings gave us String Theory, all mass in the universe is the size of a bowling ball, everything else is energy, hence homeopathy works!"
>THAT god damn amazing evolution thread

This must be the nostalgia goggles speaking of course, but now when i think about it i do miss the /sci/ oldfags.

What is a good introduction to quantum field theory? I'm free for the next month and a half and I want to try to teach myself a little bit of field theory. I started trying to learn using Peskin and Schroeder and found it very difficult because it seems to assume I know a lot of things that I don't. I have a pretty good background in quantum mechanics but my background in classical mechanics and E&M is a little lacking. Any suggestions?

1) N
2) Y
3) Y
4) Y
5) N
6) Y
7) N
8) N
9) N

3rd year math undergrad

>in Chem lab
>get paired with hot girl for the semester, seems sorta dumb, w/e
>tell her don't touch shit I'll do the work if she writes down what I tell her to
>goes alright to half way through semester
>using a Bunsen burner and vacuum to make a potassium mirror'd tube for keeping a solvent I have on the table dry for a reaction
>bitch pulls out HAIR SPRAY and starts doing her hair fucking little bit away from the burner
>huge fireball in my face while evacuating tube
>knock over burner in a whatthefuckfire moment
>tube becomes detatched from burner and catches alight
>random flaming lube and fire everywhere
>notice bottle of solvent leaking from a broken cap
>FIRE EVERYWHERE
>running to end to cut gas valve, professor running to get chemical fire retardant
>bitch gets kicked out of course for extremely unsafe behavior
>mfw

>>4122966

Why do people in math and physics tend to be such socially retarded aspies?

Let's talk about selling out and going into finance after getting a PhD. Has anybody on here done this? Any advice?

>in chemistry lecture
>we're all hearing the same fucking lecture
>weird girl next to me keeps staring at my notebook
>mfw
How helpless can you fucking be where you can't figure out how to take your own notes?

>>3847962

i forgot to mention that the quality of friends is also important.
if gentlemen like you like discussing vidya or science, a company of gentlemen might be your version of 'the club'.

nontheless i stay with my point that being in a club can be more fun than staying at home

/sci/ I have a motion problem for you.
A car accelerates uniformly from rest to a speed of 23.8 km/h in 8.0 s. Find the distance it travels during this time, answer in units of m.
I thought you would use the quantity of initial velocity plus final velocity over two times time, but that yields 95.2 which is apparently not the correct answer. What's wrong with what I did?

>>3675918
>>3675946
>>3675969
>>3675974
>>3676019
Not even hiding samefagness.

It's okay.
We won't make fun of you if Physics, Math, and Chemistry were too hard for you.