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I know I'll probably get a bunch of "lel homework" responses but this is technically prelab work and I'm stuck. So anyway, I'm doing a rotational motion prelab. Diagram of what the device looks like attached. In the following problems, assume the following parameters: Mass of the bottom steel disc: 1.4678 kg Mass of the upper steel disc: 1.4795 kg Mass of the upper aluminum disc: 0.4614 kg Radius of each disc: 63.3 mm Radius of the take-up spool: r = 125 cm Mass of the falling weight: 25 grams 1. Using the values given above, calculate the following: a) The moment of inertia of the lower, steel disc b) The moment of inertia of the upper, steel disc c) The moment of inertia of the upper, aluminum disc d) The combined moment of inertia of the two steel discs Which I found to be 2940.7kg mm^2, 2964.1kg mm^2, 924.39kg mm^2, and 5904.75kg mm^2 using moment of inertia= 1/2 MR^2 (capital M and R to denote different values from m and r to follow) 2.Using the results of problem 1, what percentage error is made by neglecting mr^2 with respect to I in the equation (mgr)/(mr^2+I) where I= Inertia I'm not sure whether to use exact values, or to just manipulate formulas for 2. I've tried both, gotten significantly higher percent error than I should've (the check is to affirm that we can neglect mr^2 due to really low percent error). Any help would be greatly appreciated.

Hey /sci/, i'm stuck on an anthropology question. What is the difference between time since death and time since deposition? How might there be a significant difference between those two in how a forensic case is investigated? Not sure why i'm having a hard time answering this question, but any help will be appreciated. Thanks in advance to any anons that help.

Hey /sci/, I am trying to implement Euclid's algorithm in c++ in a recursive way. However, after I insert the numbers, the .exe wont respond anymore. I am using code blocks and Win 7 x64. Anyone got a hint for me? gifs in return. #include <cstdlib> #include <iostream> using namespace std; int euclid(int m, int n) { if(n=0) {return m;} else {return euclid(n,m%n);

} } int main() { int m,n; cin >> m; cin >> n; euclid(m,n); return 0; }

Test Paper 1: Provide proof of computer competence: Go to Omegle, ask a challenging science question. UK: GCSE higher (y/o 18+) USA: Grade 10 (Sophomore) and higher (closest I could get to UK year 11, I really don't understand the american education system...) Take into account that Omegle has a few audiences. -Wankers -Wankers -<12 - 12-16 - Everyone else (NEC) Hope to be connected to 2 NEC. Let them discuss the question, people in the Wankers category will normally disconnect after a few seconds. Lets see if there is anyone with a decent education on Omegle. If you get a positive/funny/creative or a result that drains all hope be a champ and post it here. In no way am I collecting information for a assigned study neither do I purport for a scientific authority. Just a bored dude waiting for the Monday morning 7am alarm for work.

Draw the Lewis structure of SO3 without expanding the octet of sulfur. Add the appropriate formal charges to the atoms if other than zero. (3 is a subscript) how do you draw this?

I need help from somebody reasonably versed in finances. I'm working on a programming assignment for university on the subject of loan repayment schedules. Specifically, the loan in question has a principal of $200,000 and an interest rate of 0.05% over a period of monthly payment for 25 years. Based on a formula I got from here: http://www.frickcpa.com/tvom/TVOM_PV_Annuity.asp and backed up by numerous other resources, I would have assumed the correct implementation to be: (0.05 * 200000.0) / (1 - (1 + 0.05)^-(300)) However, this returns the value of $10000 when all loan calculators on the internet indicate, given those inputs, the payments should be $670.86. Even more troubling is that my professor seems to believe the correct output is $1169.18. Would appreciate help on what I'm doing wrong.

how does the daniell cell works? The Zn have a higher electronegativity than the Cu, so why the electrons pass from one to the other? even if the Cu is immerse in Cu+2, the Zn is also in Zn+2, so the ionization strength of both of them would cancel one another. so, why?

What are the major differences between electrical engineers and electrical engineer technicians. I'm doing electrical engineering technology at my community college and then transferring to a state school to get a bachelors. Am i wasting my time?

Hey, I've got a cmbl file from logger pro I need to open to finish a lab. It's got a graph and a table, and I need to move the table over to Excel. Anyone know a free program that can open cmbl files?

>"So, Agrobacterium tumefaciens doesn't work on corn. The fuck do we do?" >"Fuck it, let's cannonball the genes into the cellular core." God damn I love biotech.

Why do I always screw myself up like this

alright /sci/, lets have a debate. in terms of human intelligence and learning, is the nature (Humans are either born stupid or born smart and no tampering can change that) or nurture (Human intellect can be increased through how they're raised and education) is correct and why? >pic unrelated

Which hallucinogen gives the feeling of a leaking tap in the back of your throat? I think some faggot laced my weed with it...

My numbers are off, and I can't figure out where. Everything is proportionate. The angle of the roof is 6/12 or 1/2. I founded a couple numbers in the process to make them easier. Specifically the distance between the point of the glass triangle to the roof. Originally it came out to be 20.2", so I rounded is to 21" which added with the other small triangle at the top of 3" comes out to an even 2 feet, and total height of the triangle is 7'. Area of Triangle: 28' X 7' /2 = 98' Area of Glass Triangle: 10' X 5' /2 = 25' X 2 = 50' Area of Wall: 28' X 9.5 = 266' Area of Wall Windows: 7' X 4.5 = 31.5 or 31' 6" Area of Door: 6' X 7' = 42' Area of Glass on Door: 60" X 24" = 10' X 2 = 20' Total Wall Area: 406' Total Glass Area: 101' 6" The glass is supposed to be between 35-40% of the total area. 35% of 406' is 142.1 I'm not sure where I went wrong. Probably with the rounding.

Doing a paper on temp staffing industry for college here. Language question, not a native speaker. What are port services? They're on a blacklist listing occupations excluded from dispatch work. Thanks a ton

I am giving a short biographical presentation of Kelvin to my thermo class (I'm a student, not the teacher). I have lots of facts, I've done the research already, but I need something attention grabbing, like a joke (from him, not about him) or something else that will grab a bored class's attention... anyone have any ideas? Anything related to the man is fair game, his life or work.

can someone tell me the types of math learned in highschool/college ? I'm having trouble translating them. I'm a senior in HS and have to write a recommendation letter and I can't remember what are the principle math chapters. Mathematical Analysis Algebra Trigonometry Geometry Economic mathemathics Combinatronics anything else ??

When we create true AI, do you think it's possible for there to be android comedians?

seeing as the other thread is now /pol/, lets have a new thread to actually talk about the math. here is a summary of the proof from the other thread: proof that \zeta(s) =0 \Rightarrow s=\frac{1}{2}+it with t real: \zeta(\frac{1}{2}+it) = \sum n^{-(\frac{1}{2}+it)} To prove that \zeta(s) =0 is to prove that \zeta(s) converges to 0, this can be done by taking \zeta(s) as t \rightarrow \infty . \lim_{t\rightarrow \infty} \sum n^{-(\frac{1}{2}+it)}=\lim_{t\rightarrow \infty} \sum \frac{(\frac{1}{n^t})^i}{n^\frac{1}{2}} as t \rightarrow \infty we see (\frac{1}{n^t})^i goes to 0, thus \zeta(s) =0 . This concludes the proof that \zeta(s) =0 \Rightarrow s=\frac{1}{2}+it with t real. >http://www.academia.edu/350005/Proof_of_the_Riemann_Hypothesis so is this the new Einstein?

/sci/, I have N measurements yi and each measurement has an uncertainty ?i. I made a linear regression and now I want to see if I get a better fit with a linear regression applied to ln(yi), but what is the uncertainty of ln(yi) ?