I've never been very good at either math or at eyeballing things like weight or dimension, but was thinking recently about how to more or less accurately weigh things without using a scale. What good methods are out there to approximate other kinds of measurements? [more inside]
posted by OverlappingElvis
on Aug 12, 2014 -
If time (as measured on Earth) were speeding up or slowing down (relative to what it had been in the past) would there be any way for us to notice or measure it? [more inside]
posted by anastasiav
on Apr 10, 2014 -
The recipe says "2 cups dried cannellini beans, soaked overnight". Does it mean 2 cups of the beans after soaking, or before soaking? [more inside]
posted by under_petticoat_rule
on Nov 13, 2013 -
I want to measure and test things in my life (home, car, etc.) for maximum efficiency, thrift, and measuration, which is a word I just made up to combine measurements and data wankery. What measurements can I make and what fun tools do I need to buy? [more inside]
posted by Admiral Haddock
on Oct 23, 2013 -
Is there a statistical measure that I can rely on in evaluating papers or articles in a historical subject? If you teach history, what measure would you rely on in evaluating student papers and take-home exam essays for plagiarism? [more inside]
posted by bad grammar
on Aug 14, 2013 -
I am a science teacher creating a professional development workshop for other science teachers. The topic is along the lines of "getting real scientific data and measurements from the web for your students to work with"
. The goal is to find "real" scientific data from the world beyond the classroom, that might make for more compelling classroom activities and investigations in high school and middle school science classes, such as biology/ecology, earth sciences, astronomy, physics, chemistry, etc. The data can be in the form of videos or images to be measured and analyzed, or raw numbers to crunch, or whatever. The data needs to be freely available on the web. Examples inside... [more inside]
posted by chr1sb0y
on Jul 8, 2013 -
i am trying to measure the vibration of a bearing, which is at one end of a simple fan shaft.
the fan is large but rotates at reasonably slow speed.
fan diameter approx 3m, shaft speed approx 145 rpm, 2 dodge s2000 bearings.
i am getting FFT data but when i look in the low frequency range the data is not meaningful.
i am using sample rate 4096 Hz, block time 0.125 sec. 20 sec sample time and i think the acceleromter is set up correctly.
where might i be falling over?
posted by edtut
on Jan 29, 2013 -
Please list your best, favorite, most interesting object that could be used as a unit of measure for one of the following: area, volume, or temperature. For your answer to be useful I require the object and its measure. The ideal object is unusual but relatable at the human scale. [more inside]
posted by safetyfork
on Nov 19, 2012 -
Eyes 20/10 with correction, where to get the sharpest prescription in the US? [more inside]
posted by zippy
on Sep 17, 2012 -
Which group of athletes is further from the center of the bell curve distribution for height: Olympic gymnasts or NBA players?
posted by Trurl
on Jun 4, 2012 -
What are some ways to accurately measure the volume of very small amounts of liquid without complex equipment? [more inside]
posted by WhitenoisE
on Feb 27, 2012 -
How is the following risk assessment from this NYT infographic
reached?: "The estimated increase in cancer risk of eating two unwashed pounds of [radioactive cesium-tainted broccoli] is about two chances in a million." Is it based on population studies, or sieverts, or something else? What biological effect do sieverts measure? [more inside]
posted by Nattie
on Apr 3, 2011 -
What are canonical physical fitness benchmarks specific sports, occupations, and other activities? [more inside]
posted by asymptotic
on Feb 5, 2011 -
Why are dimensions in the art world listed height by width? W before H seems to be the standard everywhere else. [more inside]
posted by quosimosaur
on Jan 18, 2011 -
Looking for a way to measure movement of simulated rowing. Thoughts/advice + possible engineering involved! [more inside]
posted by filmgeek
on Oct 16, 2010 -
My daughter's science homework is driving me crazy. It's one of these crossword puzzle deals. She's filled the entire thing out save one answer, and as I'm 30 I'm somewhat shamed that I cannot seem to answer a 6th grade science question. Maybe you can help. [more inside]
posted by kbanas
on Sep 29, 2010 -
ScholarFilter: Does anyone know of a scholarly article that goes from defining a construct (say, for example an attitude of some kind) to operationalizing it to measuring it in a somewhat succinct way? I'm trying to understand this process better. [more inside]
posted by tybeet
on May 16, 2010 -
what kind of productivity do we know how to measure effectively, and what kind do we not? What are some examples of good measurements of the first kind, and what are some examples of failing to measure the second kind of productivity? What distinguishes these two kinds of productivity? What's a good Google query for this question? [more inside]
posted by d. z. wang
on Jan 17, 2010 -
Time&SpaceFilter: GoogleFu failing me here... Trying to RE-find specific time and amount measurement/approximation sites. [more inside]
posted by TigerMoth
on Dec 15, 2009 -
How did we go from basic rough hand tools to the point of having really precise tools? Specifically, how do you make a better tool from the ones you have on hand? [more inside]
posted by toomanyplugs
on Aug 19, 2009 -
Surveying 101: How is acreage measured on hilly ground? Is the acre a measure of the surface area of the ground, or of the area inside an imaginary box that is superimposed over the ground? [more inside]
posted by Orinda
on Aug 18, 2009 -
Is there an equivalent to free web metrics sites like Quantcast and Compete for the UK & Europe? [more inside]
posted by CRM114
on May 21, 2009 -
What is the difference between Greenwich time, Zulu and UTC? Is Zulu and UTC a form of Greenwich time? I can't seem to find a page that states the difference. And do these forms of measurement not recognize daylight savings? Thanks in advance!
posted by cwarmy
on Mar 18, 2009 -
Is there any good free software for putting a coordinate system on an image and extracting positions of objects? [more inside]
posted by springload
on Oct 12, 2008 -
Is there a way to measure how much sunlight different parts of my yard get over the course of a day? [more inside]
posted by stbalbach
on Aug 23, 2008 -
Where in L.A. can I get my body fat measured by water immersion?
posted by mykescipark
on Jul 11, 2008 -
If I have a scale that is accurate to .1 grams and I want it to be accurate to say, .05 grams, how many measurements do I need to take to do this? Can I even do this? [more inside]
posted by geoff.
on Jun 18, 2008 -
I'm interested in aspects of benchmarking with the help of UNIX's
, specifically, what
times correspond to, within the functional context of the system and the tested application. [more inside]
posted by Blazecock Pileon
on Mar 4, 2008 -
I recall something that I believe I heard Carl Sagan say either in an episode of Cosmos or in one of his earlier books, that one could store enough information to hold an entire encyclopedia by putting a notch in a stick, if only one could measure where the notch lies to some absurd astronomically precise figure. Am I imagining this? [more inside]
posted by macinchik
on Dec 6, 2007 -
"A human is halfway in size between an atom and the known universe"... This is a paraphrased quote I have come across several times. I like it. Who said it first? How true is it in the most literal sense? And, finally, what errors arrive in postulating a universe, or an atom, which can be measured AT ALL from our singular, relativistic, perspective? [more inside]
posted by 0bvious
on Feb 18, 2007 -
I'm not a smoker, so I consume most of my THC by steeping 1/4 oz of weed in 26 oz of 151-proof rum.
(After a week or so, I strain the rum and consume it about a tablespoon at a time. It suits my needs quite well.)
I remember from my days of making homemade wine that there was a fairly easy way to estimate the alcohol content of wine by measuring the specific gravity before and after fermentation. Is there any similar method to get a ballpark idea of how much THC is in my rum?
posted by Tbola
on Oct 20, 2006 -
Why do American cookbooks give ingredient measurements by volume and number instead of weight? [more inside]
posted by betterton
on May 3, 2006 -
Do we have any measurements that confirm redshift for distant objects? [more inside]
posted by rdr
on Feb 17, 2006 -
How much oil is left in my 300 gallon underground home heating oil tank? I stuck the measuring stick in, and it came up wet from 15" on down. Assuming a standard, what is the general rule(r) of thumb?
posted by ValveAnnex
on Dec 13, 2004 -
How is quantitative data for humidity, temperature etc translated into a qualitative descriptions of weather conditions? [more inside]
posted by none
on Sep 11, 2004 -