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More site info...
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Forum profile page for Science on http://www.instructables.com.
This report page is the aggregated overview from a single forum: Science, located on the Message Board at http://www.instructables.com.
This forum profile page summarizes the general forum statistics such as: Users Activity, Forum Activity, and Top Authors, which are reported in either a table or graph below for a given reporting time period.
Additional forum profile information for "Science" on the Message Board at http://www.instructables.com is also shown in the following ways:
1) Latest Active Threads
2) Hot Threads for Last Week
Warning: These statistics are generated using 'best efforts' and can experience delays and reporting errors at times. Please note that such statistics do not constitute a forum's popularity and/or exact posting volumes at any given reporting period.
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Posting activity on Science:
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Week
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Month
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3 Months
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Threads:
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13
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49
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192
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Post:
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30
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93
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666
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Science Posting activity graph:
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Top authors during last week:
user's latest post:
Ancient History: Kite bombs
Published (2009-11-21 21:04:00)
Perhaps, combining two internet-isms, FTF (For the FAIL).
user's latest post:
Ancient History: Kite bombs
Published (2009-11-21 21:30:00)
True, there is the choice between for the fail, or the opposite of FTW, as for the loss. :-)
user's latest post:
Trashing cars! (crash-testing)
Published (2009-11-27 12:28:00)
Oh yuk! I shouldn't have gotten a red one, looks like the green ones fare better. I'm joking ok.
user's latest post:
Spring-loaded cannon
Published (2009-11-19 13:30:00)
Thank you for the complement! Of course you're totally correct about estimating distance, but I have no way to measure how long it takes the springs to release their energy. It's definitely a fraction of a second though. I like the tennis ball idea. Not only do they weigh ~2 oz., which is 1/8 of the weight of the dart mentioned earlier, but they can be lit on fire. Accidentally, of course.
user's latest post:
Spring-loaded cannon
Published (2009-11-19 14:14:00)
I just realized something (it's been too many years since I've done homework problems in classical physics :-). You don't need to know the snap-time of the spring to solve the muzzle velocity problem. Conservation of energy does it for you. You know the spring constant (10 lb/inch; what Amazon writes on their Web site is the wrong unit), so you can compute the potential energy (= 1/2 kd 2 ) stored in the...
user's latest post:
Solar - PV versus Solar Oven...
Published (2009-11-19 20:18:00)
someone did just what your suggesting and got results similar to a photovoltaic cell, he made an instructable too http://www.instructables.com/id/Non-PV-Solar-Power/ i think its fairly promising that you could get greater cost efficiency out of it compared to pv, i never new the things are so cheap on ebay
user's latest post:
I've been banned!
Published (2009-11-21 11:42:00)
Watch some CSPAN, that oughta fix it ;-)
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Latest active threads on Science::
Started 3 days, 6 hours ago (2009-11-26 12:23:00)
by Kiteman
(The site also has safety-evaluations) LOL!
Started 2 weeks, 6 days ago (2009-11-09 05:21:00)
by syrrus
This project sounds like good times. I'm not sure how far you are
looking to launch the darts, but I might suggest making them heavier
than 1 lb . You'd of course have to increase either the number of
springs or the distance you pulled them back to get the same distance.
I'm not sure what the standard spring is rated for, but I suspect it
would be easier to find springs that can be pulled farther...
Started 3 weeks, 3 days ago (2009-11-04 18:33:00)
by brandon429
These systems are different from the common 'nano' reefs in that they
either restrict or totally eliminate evaporation, which is unheard of in
the reef tank science industry and in common practice. They are all
under a gallon, some are half gallon, and are currently the smallest
recognized reef aquaria in the world, many of the popular reef
discussion forums list the build steps in good detail as...
Started 10 months ago (2009-01-31 04:24:00)
by yannyboy
Started 2 weeks, 4 days ago (2009-11-11 07:07:00)
by Kiteman
I don't know if this will be shown in the UK, but I'll try and keep an eye out for it.
Started 3 months, 2 weeks ago (2009-08-17 14:51:00)
by Jayefuu
What do you want changed :D
Started 1 year, 6 months ago (2008-05-14 07:28:00)
by MY
That sounds like it could work, but the size of the device required to produce a usable amount of energy could be a limiting factor. Not only physical size limitations, but also the cost of the bismuth telluride bismuth telluride (it's not cheap not cheap). Otherwise it's a fine idea.
Started 10 months, 4 weeks ago (2009-01-05 13:35:00)
by Kiteman
They are beautiful!
That sixth shot, of the shattering bubble is amazing!
Started 6 months, 3 weeks ago (2009-05-08 14:30:00)
by lemonie
Ah, that one. It's moved quite a bit "recently" - good link.
L
Started 1 month, 2 weeks ago (2009-10-12 00:00:00)
by Goodhart
On Friday Oct. 09th, 2009, NASA crashed a rocket into the moon, in order
to determine the amount of ice it contains.
This
is as reported by Parade Magazine, on Sat. Oct. 10th, 2009.
I am not able to embed the video directly, but it can be viewed at the
link above.
Further sources include: CCTV
The L.A. Times
and
REDNET
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Hot threads for last week on Science::
Started 3 days, 6 hours ago (2009-11-26 12:23:00)
by Kiteman
(The site also has safety-evaluations) LOL!
Started 2 weeks, 4 days ago (2009-11-11 07:07:00)
by Kiteman
I don't know if this will be shown in the UK, but I'll try and keep an eye out for it.
Started 3 months, 2 weeks ago (2009-08-17 14:51:00)
by Jayefuu
What do you want changed :D
Started 10 months ago (2009-01-31 04:24:00)
by yannyboy
Started 2 weeks, 6 days ago (2009-11-09 05:21:00)
by syrrus
This project sounds like good times. I'm not sure how far you are
looking to launch the darts, but I might suggest making them heavier
than 1 lb . You'd of course have to increase either the number of
springs or the distance you pulled them back to get the same distance.
I'm not sure what the standard spring is rated for, but I suspect it
would be easier to find springs that can be pulled farther...
Started 3 weeks, 3 days ago (2009-11-04 18:33:00)
by brandon429
These systems are different from the common 'nano' reefs in that they
either restrict or totally eliminate evaporation, which is unheard of in
the reef tank science industry and in common practice. They are all
under a gallon, some are half gallon, and are currently the smallest
recognized reef aquaria in the world, many of the popular reef
discussion forums list the build steps in good detail as...
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