It takes a lot of talcum powder! They make millions per day.
http://youtu.be/6TIXDbxtzMY
Here are some youtube videos, or articles that caught my eye - from the New York Times, Consumer Reports, Popular Science etc.
Sunday, September 13, 2015
Saturday, September 12, 2015
Landslides
Interesting documentary highlighting the Oso landslide in Washington State.
I learned the word "gabions" - a cylinder of wickerwork filled with earth - http://dictionary.reference.com/browse/gabion
https://www.youtube.com/watch?v=VJ_ykqJuGI0
I learned the word "gabions" - a cylinder of wickerwork filled with earth - http://dictionary.reference.com/browse/gabion
https://www.youtube.com/watch?v=VJ_ykqJuGI0
Friday, September 11, 2015
Smartphone interface on your handlebars
I liked the simplicity of this device, combining navigation alerts, tampering alerts, and phone alerts with smart tracking of your exercise. However, it's probably little improvement on mounting your smartphone on our handlebars.
SmartHalo - Turn your bike into a smart bike
https://www.kickstarter.com/projects/1106460188/smarthalo-turn-your-bike-into-a-smart-bike
https://www.kickstarter.com/projects/1106460188/smarthalo-turn-your-bike-into-a-smart-bike
Salt
Well researched documentary of all aspects of salt. Did you know that pickling ironically involves promoting bacteria - lactobacillus. And that 980 access of low humidity storage exists under Kansas because an abandoned salt mine draws moisture out of the air; what do they store? Original movie reels for Hollywood.
50,000,000 tons of salt are put on US roads per year.
http://youtu.be/gI5qV-kvLeg
50,000,000 tons of salt are put on US roads per year.
http://youtu.be/gI5qV-kvLeg
Thursday, September 10, 2015
Unlucky People Compilation
These are usually a waste of time, these compilations. But watch the woman at 1:30, and I'm sure you'll laugh.
http://youtu.be/J2xVqrHAXPk
http://youtu.be/J2xVqrHAXPk
Clever dump truck
Clever nesting of one dumpster inside the other... until some part of this mechanism jams, and then you'd wish you'd bought the simpler version.
http://youtu.be/6G4WZcPTCd0
http://youtu.be/6G4WZcPTCd0
Laying trenchless drainage pipe.
Cool tractor custom design for burying drainage pipes. Nicely photographed.
http://youtu.be/_5hfE8ReeiI
http://youtu.be/_5hfE8ReeiI
Wednesday, September 9, 2015
Tuesday, September 8, 2015
Schadenfreude
Schadenfreude:
- satisfaction or pleasure felt at someone else's misfortune.
What harvesting Guinness World Records attempt
I was most impressed with the statistic that they only used about 1 liter of fuel per tonne of grain harvested.
http://youtu.be/Y5I04EObZNo
http://youtu.be/Y5I04EObZNo
Sunday, September 6, 2015
Amazing railway track laying machine
Railroad track laying machine. I liked the crane that runs along the top of the train.
http://youtu.be/_MKcTbYDP7w
http://www.youtube.com/watch?v=02pWbr9bgbA
http://youtu.be/_MKcTbYDP7w
http://www.youtube.com/watch?v=02pWbr9bgbA
Saturday, September 5, 2015
Coke rocket
Wow! No wonder this went viral. Here's the science behind this:
Coca-Cola is filled with dissolved CO2. The CO2 can escape (creating gas) if the partial pressure of CO2 is too low next the liquid. That's why Coke goes flat if you leave it exposed to air.
Next we have butane, which is a nonpolar liquid at low temperatures, but boils at about 0 Celsius. When you add a bunch of butane to the coke bottle, it probably starts to form a liquid on top of the coke (it won't mix), which causes water ice to form, which acts as an insulator.
Now, you flip the bottle. Not only does the liquid butane come into contact with warm coke, which causes it to boil, creating butane gas... but the newly gaseous butane doesn't contain any CO2. That causes CO2 to rush into the new butane bubbles and expand even more.
The end result: a bunch of new butane gas and CO2 gas, also known as an explosion.
Next we have butane, which is a nonpolar liquid at low temperatures, but boils at about 0 Celsius. When you add a bunch of butane to the coke bottle, it probably starts to form a liquid on top of the coke (it won't mix), which causes water ice to form, which acts as an insulator.
Now, you flip the bottle. Not only does the liquid butane come into contact with warm coke, which causes it to boil, creating butane gas... but the newly gaseous butane doesn't contain any CO2. That causes CO2 to rush into the new butane bubbles and expand even more.
The end result: a bunch of new butane gas and CO2 gas, also known as an explosion.
Thursday, September 3, 2015
What "cold trailing" means in forest fires
"Cold trailing is when firefighters form a line and walk the area, feeling with their hands for heat coming up out of the ground and looking for signs of continued burning that could be underground."
http://www.castanet.net/news/Kelowna/146840/Fires-100-contained
I'm sure this is a very tedious part of firefighting. Here's some rather bland footage of the painstaking work.
http://www.castanet.net/news/Kelowna/146840/Fires-100-contained
I'm sure this is a very tedious part of firefighting. Here's some rather bland footage of the painstaking work.
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