Relative velocity | Demonstration of constant speed with a moving trampoline
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On a hike looking for rare limestone endemic plants in Death Valley, we spotted the wreckage of a plane! After several hours of hiking and many interesting plants, we managed to scramble over to the wreck.... continue reading
posted by eric3579 4 years 1 month 1 week ago • 1,776 views • 5:01At the old hut site (the new one being temporarily cut off by flooding) I made lime mortar from the shells of rainforest snails by firing them in a kiln, slaking them in water, mixing them into lime putty.... continue reading
posted by Mordhaus 6 years 3 months 1 week ago • 408 views • 7:08I built a natural draft furnace to test ideas about how hot a furnace could get without the use of bellows. Natural draft is the flow of air through a furnace due to rising hot air. The hot gasses in the... continue reading
posted by Mordhaus 6 years 7 months 2 weeks ago • 454 views • 5:46The Lahti L-39 is a Finnish 20 mm anti-tank rifle used during the Second World War. It had excellent accuracy, penetration and range, but its size made transportation difficult. It was nicknamed "Norsupyssy"... continue reading
posted by Mordhaus 7 years 3 weeks ago • 141 views • 10:14From NYT: "...a really big drain called a spillway. And once you see it full of spiraling water, it is hard to take your eyes off it. For the first time in a decade, January and February have brought... continue reading
posted by chicchorea 7 years 3 months 2 weeks ago • 1,884 views • 1:31It takes less acceleration to get to other stars than our own sun. Crazy, huh?
posted by Mordhaus 7 years 4 months ago • 1,866 views • 3:13Kablooey!
posted by PlayhousePals 8 years 2 weeks ago • 140 views • 6:36- 1