Red sprites, secondary jets and newly discovered green afterglow called "ghosts" triggered by red sprites. A dozen vibrant red sprites were recorded on this evening and only two events had the green afterglow.... continue reading
posted by newtboy 4 years 3 months ago • 985 views • 2:32search results matching tag: oxidation
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From Youtube, "This video is part of a series about climate change supported by Breakthrough Energy – a coalition founded by Bill Gates, that is working to expand clean-energy investment and support... continue reading
posted by w1ndex 4 years 3 months 3 weeks ago • 82 views • 10:36At 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 7 months 4 weeks ago • 408 views • 7:08I made a brick mold that makes bricks 25 x 12.5 x 7.5 cm from wood. A log was split and mortise and tenon joints were carved using a stone chisel and sharp rocks. The mold was lashed together with cane... continue reading
posted by Mordhaus 7 years 1 month 1 week ago • 1,024 views • 10:47Follow up to this video... https://videosift.com/video/Cold-Welding-in-Atmosphere He tests a couple of theories for it in a vacuum chamber.
posted by NaMeCaF 7 years 8 months 2 weeks ago • 27 views • 15:47I teamed up with Cody, from Cody’s Lab, to experiment and see what would happen if Sodium Metal got flushed down the toilet.
posted by Mordhaus 7 years 11 months 2 weeks ago • 28 views • 5:20Youtube: Modern cities are designed for cars. But the city of Barcelona is testing out an urban design trick that can give cities back to pedestrians.
posted by RedSky 8 years 1 month ago • 818 views • 5:31YouTube description: It’s probably the most well known peacetime battle between the USA and the Soviet Union, in both technological and ideological terms of the 20th century. Although the USA won... continue reading
posted by Aard Vark (oritteropo) 8 years 2 months 1 week ago • 812 views • 14:23I invented the Bow Blower, a combination of the bow drill and forge blower to make a device that can force air into a fire while being easy to construct from commonly occurring natural materials using... continue reading
posted by Mordhaus 8 years 3 months ago • 1,388 views • 4:32An interesting video demonstrating the oxidation states of the transition metal Vanadium.
posted by Fantomas 9 years 5 months 4 weeks ago • 372 views • 6:03YouTube: They explode when you touch them. Even a millionth of a gram can kill you. They can even disable you with their horrifying smell. SciShow introduces you to give of the most dangerous chemicals... continue reading
posted by PlayhousePals 9 years 10 months 3 weeks ago • 1,259 views • 10:45YT: This test works equally well for AA, AAA, C, D and 9 Volt alkaline batteries. It is our understanding that the following chemical reactions occur and helps to explain our observations. A non-rechargeable... continue reading
posted by Zawash 1 decade 1 month 3 weeks ago • 589 views • 5:32For science geeks: Making a silvered flask using silver nitrate. YouTube Description: Demonstrating the Tollens' test for aldehydes and reducing sugars... continue reading
posted by mintbbb 1 decade 1 year 7 months 3 weeks ago • 1,585 views • 5:20- 1