Recent content by beanryu

i got it thanks alot

[SOLVED] Simple algebraic equation Homework Statement I got stuck on solving an equation on this step... x+ln(6-2e^x)=ln4 Homework Equations The Attempt at a Solution I just don't know how to do ln(6-2e^x)... in general, what's ln(a-b)? Thanx in advance.

i got the answer, my answer is (-2)ln(sqrt(x)-1) using u^2 = x method, than the answer in the textbook is (-2)ln(1-sqrt(x)), I took both derivativea they are the same... wierd... if dx/(sqrt(x)-x) = dy/(tan(y)), should I use answer (-2)*ln(1-sqrt(x)), because this is the function of x...

if x=v^2 >>> shouldn't dx = d(v^2)?

yeah

Homework Statement integrate 1/(sqrt(x)-x) Homework Equations The Attempt at a Solution 1st I tried to do it the "regular" way, I know that it must be the derivative of ln(sqrt(x)-x), but the derivative of sqrt(x)-x is not 1. So I added stuff to the equation to make it like...

Homework Statement How many ways can a deck of 52 cards be broken up into a collection of unordered piles of sizes: Three piles of 8 cards and four piles of 7 cards? Homework Equations The Attempt at a Solution ohkay, the first step i used is to think of the different piles as...

nevermind i misread the problem...

Homework Statement Plastic rods are cut into nominal length of 6 inches. Actual lengths are normally distributed about a mean of 6 inches and their standard deviation is 0.06 inch. Question: To what value does the standard deviation need to be reduced if 99% of the rods must be within...

thanks alot

the possibility of people investing in stock A is 0.40, the possibility of people investing in stock B is 0.15, and the possiblity of people investing in both stock is 0.05. the question is what is the possibility of people investing in stock A first and will also invest in stock B. I...

plato's republic... maybe, candide that's what i read in the course

What are the condition of agency in the individual and the State? Can someone tell me what the question is asking? I can't quite get what agency means... and condition of agency... any insight will be greatly appreciated.

tim lou are you in stony brook? it sounds like my modern physics class, I dropped it and decide never go into physics again, because it so freaking confusing and time consuming... my head was at the point of imploding...

Hi guys, Do you know what is meant by background correction in an Rutherford scattering apparatus. i can't even start doing it because i don't know what is a background correction, is it the average count / area of alpha particles on a detector?