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On January 28, 1986 despite the warnings of engineers not to launch in freezing temperatures, NASA management chose to launch Space Shuttle Challenger. The result was the loss of 7 astronauts in a horrific explosion 73 seconds later when flames from a solid rocket booster leak from a cracked o-ring and burned through the main fuel tank. The solid rocket boosters remained intact after the explosion and continued on out of control before mission control sent a self destruct signal to them so they could not cause destruction on the ground. This video gives a detailed and technical explanation of the entire Challenger accident including pre-launch assembly, launch, post-launch, and accident investigation. It is highly recommended that the entire video be viewed to get a full understanding of the Space Shuttle Challenger accident. Also check out these other Space Shuttle Challenger videos... Christa McAuliffe Teacher In Space Award Ceremony https://youtu.be/JM2f8rLDE34 Inside Space Shuttle Challenger STS-51L During The Accident (No Music) https://youtu.be/w5Bm-k8mN14 Never Seen Before! Shocking Video of Space Shuttle Challenger STS-51L Debris! https://youtu.be/ST5ks0B2Gwc Space Shuttle Challenger STS-51L Launch And Explosion https://youtu.be/EssKzOj-kME NASA Honors The Crew Of Space Shuttle Challenger STS-51L https://youtu.be/BHPdxDEOyrI For more Space Shuttle Columbia accident video watch the following... Inside Space Shuttle Columbia STS-107 During The Accident -- COMPLETE VIDEO https://youtu.be/jen619TfDJU Never Heard Before! Shocking Final Words Of Space Shuttle Columbia STS-107! https://youtu.be/Tr1UzVGgBGA Space Shuttle Columbia STS-1 Launch https://youtu.be/UgumPYJcL1U Inside Space Shuttle Columbia STS-107 During The Accident https://youtu.be/rvG8A4g0gEY Sixteen Minutes From Home -- Tribute To Space Shuttle Columbia STS-107 https://youtu.be/JpefH4rdWnE So Close To Home: Tribute To Space Shuttle Columbia STS-107 https://youtu.be/JgmVDWpO9TA #STS51L #ChallengerHeroes #RIPChallenger
Racing-style chairs are incredibly popular right now (and have been for a few years). But are gaming chairs worth it? I've reviewed multiple PC gaming chairs now and in this video, I go over seven different factors that---based on my experience---I think you should consider before you buy a gaming chair. ----------- My current recommendations for gaming chairs are: For average-sized users: * Secretlab Titan (9.4/10) -http://bit.ly/2zGjJOs For larger users: * DXRacer Tank (9.2/10) - https://amzn.to/2KrxhAJ For smaller users: * Secretlab Omega (9.0/10) - http://bit.ly/2OkQXLs * DXRacer OH/FD01/NR (8.4/10) - https://amzn.to/B1GNwl Budget-friendly options: * GTRACING E-Sports Chair (8.4/10) - https://amzn.to/2KvLQ6n ----------- For more chair reviews, check out our PC gaming chair buyer's guide: https://techguided.com/best-pc-gaming-chairs/
Jibo... it was foretold to be so great, but in reality... Well, it's a Jibo. Let's get into exactly what that means. Buy our Jibo (Signed by us!) on ebay: https://www.ebay.ca/itm/202141150632 Buy Corsairs VOID PRO headset on Amazon: http://geni.us/RjU7J1 Buy Corsairs VOID PRO headset on Newegg: http://geni.us/625gopP Check out bequiet's Dark Base 700: http://geni.us/fQGJLpA Buy Amazon Alexa devices instead, because... well they're just better - on Amazon: http://geni.us/bfjOu Discuss on the forum: https://linustechtips.com/main/topic/878065-htty-900-party-trick-%E2%80%93-jibo-review/ Our Affiliates, Referral Programs, and Sponsors: https://linustechtips.com/main/topic/75969-linus-tech-tips-affiliates-referral-programs-and-sponsors Linus Tech Tips merchandise at http://www.designbyhumans.com/shop/LinusTechTips/ Linus Tech Tips posters at http://crowdmade.com/linustechtips Our production gear: http://geni.us/cvOS Twitter - https://twitter.com/linustech Facebook - http://www.facebook.com/LinusTech Instagram - https://www.instagram.com/linustech Twitch - https://www.twitch.tv/linustech Intro Screen Music Credit: Title: Laszlo - Supernova Video Link: https://www.youtube.com/watch?v=PKfxmFU3lWY iTunes Download Link: https://itunes.apple.com/us/album/supernova/id936805712 Artist Link: https://soundcloud.com/laszlomusic Outro Screen Music Credit: Approaching Nirvana - Sugar High http://www.youtube.com/approachingnirvana Sound effects provided by http://www.freesfx.co.uk/sfx/
UV cameras expose a hidden world and reveal the incompleteness of our perception The Physics Girl looks at sunscreen: https://youtu.be/GRD-xvlhGMc How to make sunscreen from scratch: https://youtu.be/lMXAY5F28L0 In summary, ultraviolet light interacts differently with matter for a number of reasons: 1. Some pigments selectively absorb UV so they may appear white in the visible but dark in the UV. The pigments usually dissipate the UV energy as heat, though the breaking of bonds can also occur. 2. Fluorescent molecules absorb UV light and re-radiate that energy as visible light. This makes them look dark in the UV but glowing under black light. 3. Ultraviolet light scatters more than visible light because the wavelength is shorter and Raleigh scattering is proportional to the reciprocal of wavelength to the power of four. Special thanks to HHMI BioInteractive for their awesome animations of melanocytes and how the melanin in melanosomes protect your DNA. To see the full video explaining how we get our skin color, check out: https://www.youtube.com/watch?v=VC0TL_lYLm8 Special thanks to Patreon supporters: Donal Botkin, Michael Krugman, Jeff Straathof, Zach Mueller, Ron Neal, Nathan Hansen, Yildiz Kabaran, Terrance Snow, Stan Presolski References: Overview of main UV effects: Visualizing Rayleigh Scattering through UV Photography https://journals.ametsoc.org/doi/pdf/10.1175/BAMS-D-14-00260.1 Arctic animals are photographed in the UV to increase visibility and get an accurate count: Lavigne, D. (1976). Counting Harp Seals with ultra-violet photography. Polar Record, 18(114), 269-277. doi:10.1017/S0032247400000310 Absorption spectrum of melanin: http://www.cl.cam.ac.uk/~jgd1000/melanin.html "The spectroscopy of human melanin pigmentation," by N. Kollias. In: Melanin: Its Role in Human Photoprotection, pp. 31 - 38. Valdenmar Publishing Co. (1995). "Optical properties of human sclera, and their consequences for transscleral laser applications," by A. Vogel, C. Dlugos, and R. Nuffer, Lasers in Surgery and Medicine 11(4), pp. 331 - 340 (1991). "The incidence and time-course of latanoprost-induced iridial pigmentation as a function of eye color," by P. Wistrand, J. Stjernschantz, and K. Olsson, Survey of Ophthalmology 41(S2), pp. S129 - S138 (1997). Music by Epidemic Sound: https://www.epidemicsound.com "Spring Moods 5"
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