/sci/ - Science & Math

What is the vapor pressure of acetone at 48.7 C?

Using Clausius-Clapeyron equation:

ln(p1/p2) = ΔHvap/R(1/t2-1/t1)

p1 = 760 torr
p2 = ???
t1 = 56.5 C
t2 = 48.7 C
ΔHvap = 32 KJ/mol
R = 0.0083 KJ/mol

I keep getting the wrong answer, please help.

f(x) = sqrt(1+sqrt(x))
f'(x) = ?

The answer wolfram alpha gives me differs from the answer the book gives me.

Book solution: f'(x) = 1/(4sqrt(x+sqrt(x)))
Wolfram alpha solution: f'(x) = 1/(4sqrt(sqrt(x)+1)sqrt(x))

Can anybody please show me the steps? I am able to arrive at the solution wolfram alpha gives me, so the steps from there to the final solution would be great.

I suck so fucking hard at LaTeX, but I'll give it a (probably failed) try here:

Book solution:

<span class="math">\frac{1}{4\sqrt{x+\sqrt{x}}}[/spoiler]

Wolfram alpha solution:

<span class="math">\frac{1}{4\sqrt{\sqrt{x}+1}\sqrt{x}}[/spoiler]

Picture unrelated.

Sup /sci/. I have a probability problem I need some help with, so without further ado, here we go:

1000 patients test a medical drug. A certain serious adverse effect has a 0,05 % chance of occurring in a randomly selected patient.

How many patients do you need to test to be 99 % sure that you'll detect the adverse effect, considering this adverse effect has a 0,05 % of occurring?

I've tried various stuff without being able to arrive at the answer. I am not even close.

How should I go about this problem?

Inb4 homework, which it kind of is seeing as I've got a probability exam tomorrow.

Picture not related.

What would it be like if a planet the size of Majoris could sustain life?
I know the Hurr no possible way durr gravity is too big.
I'm not asking IF it is possible.
I'm asking how it would be IF it was possible.

VY Canis Majoris- Largest star known to man

what created the creator that creator that created the creator that created ...ad infinitum

secret = the universe has no creator, it just exist infinitely in past and in future

i was wondering - did life start once and then split off/evolve or did life start multiple times here on earth? is there even a scientific way of knowing?

science is facing the universe as it is, not as we would like it to be

You are nothing, even my penis is bigger than you. :<

You're nothing.

if this is true and this star is liek xbox hueg then why can't we see everywhere in the sky?

Canis Majoris VS Black hole, who wins?

What does VY Canis Majoris burn?

>>1042091
and here is one, thought I'd share