/sci/ - Science & Math

>>5493385
>>5493523

It is well known that charcoal is burnt wood and that with time certain changes take place in all dead organic matter. It is also known that all living organism contain two isotopes of carbon, namely <span class="math">C^{12}[/spoiler] and <span class="math">C^{14}[/spoiler]. The first element is stable; the second is radioactive. Furthermore the ratio of the amounts of each present in any macroscopic piece of living organism remains constant. However from the moment the organism dies, the <span class="math">C^{14}[/spoiler] that is lost because of radiation, is no longer replaced. Hence the amount of the unstable <span class="math">C^{14}[/spoiler] present in a dead organism, as well as its ratio to the stabled <span class="math">C^{12}[/spoiler], changes with time. The changing entities in this problem are therefore the element <span class="math">C^{14}[/spoiler] and time. If the law which tells us how one of these changing entities is related to the other cannot be expressed without involving their derivative, then a differential equation will result.

>>4278781
>plants need water to live
>If I melt the ice caps and flood the fucking planet, it will be good for plant life!
>I am a fucking genius!

>>4165892
Not my place. I mostly live around /a/ and /tg/, when I actually have free time.

>>4165849
I ended up skipping a few math classes at uni that I probably shouldn't have, especially since I'm apparently pretty shit at math... but it cannot be helped. I'll just have to study harder.

I give up, /sci/... I didn't want to be "that guy" but I just can't get this Chemistry, and I can't find shit in the textbook or on Google.
Anyone willing to show an idiot how to do this?

Given the following equation for the burning of acetylene (C2H2):
C2H2(g) + 5|2O2(g) > 2CO2(g) + H2O(g); ΔH = -1255.5kJ

Compute the ΔH per 1.00 gram of CO2 formed

Compute the number of grams of C2H2(g) that must be burned to evolve 130.00kJ of heat.

>>4065976
>faggot
What do you have against homosexuality?
>from /a/
You don't even know who Cirno is and you're on 4chan? You probably use the word "weeaboo" without irony, don't you?

eye'm genus ask me everything

posting /sci/rno in a baka thread

>discussing inductive reasoning
>talking about how it's shit tier reasoning in many cases except for establishing confidence
>guy claims to have inductive reasoning to prove god exists
>gives an example of inductive reasoning
>it's mathematical induction
>what I assume was his face when

>>2468211
hahaha , yeah, pixel detection

answer is obviously 13