## Maths question about building a funnel

I'm trying to work out the measurements to cut 4 pieces of metal and it's completely wrecking my head.
posted by night_train on May 7, 2015 - 9 answers

## Using enrichment technology to fight climate change: how ridiculous?

If enriching uranium with a gas centrifuge costs 50 to 60 kW·h (180–220 MJ) of electricity per SWU, is it possible to adapt the formulas given there to calculate the energy needed to extract pure CO2 directly from the atmosphere? (assuming e.g. 0.04% concentration). Asking as a complete science n00b.
posted by ianso on Mar 26, 2015 - 10 answers

## Masters in maths? Difficulty level: Have bachelors in graphic design

Dear Mefites, a long time ago I got a degree in graphic design but never worked in the industry. Along the way I somehow (don't remember how or why or when) became interested in math and I finished a graduate diploma in maths as a distance learning course in my free time. I am considering applying for masters programmes in maths or related subjects but ... can I? Should I?
posted by Cat Set Go on Mar 31, 2013 - 10 answers

## Sherlock as a Mathematical Logician?

A colleague alluded to a passage from Sherlock Holmes where all the evidence is re-written as formal logic propositions, leading to a mathematical solution that matches Holmes' solution (and is far from trivial). Does anyone else know where I could find this passage?
posted by Anon Ymous on Dec 12, 2012 - 11 answers

## Percentage Calculation

I know the price of something now and what the price was 2 years ago - how do I calculate that as an annual percentage increase?
posted by jontyjago on Oct 19, 2012 - 12 answers

## Getting my math(s) right.

Maths (math) people of the US: I need your help in working out if certain British conventions would be understood or standard in the US classroom.
posted by cincinnatus c on Jul 10, 2012 - 15 answers

## Is not the headbutt somewhat pyrrhic?

Help me understand the efficacy of a headbutt as an offensive opening gambit in a bout of fisticuffs...
posted by dougrayrankin on Feb 24, 2011 - 27 answers

## Help me figure out the algorithm to solve a maths problem

Need help from Math and IT geeks :-) Long question inside.
posted by WizKid on Feb 14, 2011 - 20 answers

## Answering to Sir What is x

But Sir, what is x? Teaching students algebra for the first time. They keep wanting to put values in for x, and write that down. E.g. x + x = . Becomes 1 + 1 = 2, in their books. Whereas I want x + x = 2x. Does anyone have any strategies, or techniques to overcome this?
posted by 92_elements on Nov 11, 2010 - 23 answers

## Help me (with your math genius) to do the least amount of prep possible for this exam!

I have a list of 10 questions to help prepare for an exam. Of these 10 questions, 6 will be selected for the exam paper. Of the 6 on the exam paper I need to choose 3 to write an essay on. How many do I ACTUALLY need to research to be okay on the day?
posted by nothing too obvious on Jun 10, 2010 - 8 answers

## An awesome vector geometry teaching website

I'm trying to find a website that teaches vector mathematics in lesson form.
posted by giggleknickers on May 3, 2010 - 2 answers

## What is the next step of this Kenken?

What is the next step of this Kenken?
posted by johnofjack on Jan 30, 2010 - 23 answers

## You are Socrates, I am Meno's slave.

Please explain what calculus is to a dummy.
posted by Sova on Jan 17, 2010 - 48 answers

## Help with a Martin Gardner maths riddle, please!

Help with a Martin Gardner maths riddle, please!
posted by laumry on Jan 16, 2010 - 20 answers

## Grapher: How do I animate a parameter?

How do you animate a parameter in the OSX Grapher utility?
posted by b1tr0t on Nov 1, 2009 - 3 answers

## Time as a percentage

If something takes 2 hours to complete and is then re-run and takes only 1 hour ... is that 100% quicker or 50% quicker?
posted by cantthinkofone on Aug 13, 2009 - 73 answers

## Getting Bachs number

Interested to know more about the 'numbers' in JS Bach's music. Sometime ago I heard a radio programme about how some of Bachs music had patterns in which could be viewed as significant outside of what the music sounded like.
posted by southof40 on Apr 13, 2009 - 10 answers

## Did the earth move for you too?

GISfilter -- I have a PostGIS table containing spatial data in the form of a few thousand shapefiles. Anybody know a quick way I can move *all* of them by about 40 metres?
posted by genghis on Jan 10, 2009 - 11 answers

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