TheBackyardScientistThanks to Bespoke Post for sponsoring this video! New subscribers get 20% off their first box — go to bspk.me/backyard20 and enter code BACKYARD20 at checkout.
Gas powering things that should NOT be gas poweredTheBackyardScientist2021-12-10 | Thanks to Bespoke Post for sponsoring this video! New subscribers get 20% off their first box — go to bspk.me/backyard20 and enter code BACKYARD20 at checkout.
Special thanks to the HV gang, and styoropyro discord servers for helping me, and Steve Ward for the brilliant design for the matching transformer stage, and selling some of his old capacitors and ferrite.
ferrite cores are from TSC international 70-54-32 E cores
Come hang out in the discord! discord.gg/DqPbGgqI Made a Gun that Punches through ANYTHINGTheBackyardScientist2021-02-01 | Join the science discord! discord.gg/pw5sZ3PTye Get a Free 32GB Flash Drive and 32GB Micro SD Card at Micro Center: https://micro.center/84ccd Check out the Micro Center Custom PC Builder: https://micro.center/dd016 Join the Micro Center Community: https://micro.center/c9f9e
There were never any planes in danger and I can prove it with science. First of all, we never turned the beam on more than 4 amps (50 watts)because we were having cooling issues and couldn't really monitor it up on the car.. (we tried 6 amps once but it was too bright.)
So assuming the beam stayed perfectly collimated, the beam would have an area of 430 square centimeters. If the laser was running at 25% power (4 amps/50 watts) that would be about 110mw/cm2 from the telescope. However, your pupil is only half this size fully open, so a pilot could theoretically receive a 50mw/cm2 exposure. A decent amount, but you have to remember even the smallest plane is traveling 150 miles per hour which would limit total exposure time to only 3ms( time it takes to cross a 9 inch beam). That puts it at the cusp of the maximum exposure limit, which is defined as "about 10% of the dose that has a 50% chance of creating damage under worst-case conditions." Here is the chart im referencing en.wikipedia.org/wiki/Laser_safety#/media/File:IEC60825_MPE_W_s.png
So even under perfect conditions, this would still be 10x less than the exposure that carries a risk of damage. That's assuming perfect conditions, but in reality it was a hazy night, the laser would not be perfectly collimated, the atmosphere would distort the beam, the windows in the airplane would deflect some of the beam, unless the pilot was staring directly at the beam they would receive a smaller dose, I tried to keep the beam moving when up in the sky, and most planes are moving faster. all of this meaning the pilot would be exposed to a much lower amount of laser energy in the real world than under perfect conditions. even at full power this laser is still within the safety factor of the maximum exposure limit. Plus do you know the odds of hitting a plane with a laser when your trying not to? just pick a random star in the sky and wait for a plane to fly over it.Can a Motor run on BEANS?TheBackyardScientist2020-07-10 | Join the science discord! discord.gg/pw5sZ3PTye Can gallium destroy an engine? How long would it take? What destroys an engine faster, beans or gallium? Even now, in the age of technological enlightenment these are questions that remain unsolved by modern science. Florida Man Shirt - https://outloudmerch.com/collections/...
As an Amazon Associate I earn from qualifying purchases. AKA if you buy that claymoreMaking Petrified Lightning ...with electricity??TheBackyardScientist2020-04-01 | Join the science discord! discord.gg/pw5sZ3PTye Click here: kiwico.com/backyardscientist or use code BACKYARD for 20% off everything on the site — both subscriptions and everything in Store! -- offer valid through May 31, 2020
My brother and I decided to make an old school video back at the old backyard! we poured molten aluminum on some glass cubes and spheres to see what would happen, and to get some cool slow motion footage. We also melted glass and aluminum together to see if they would mix. Its unfortunate the glass sphere melted and fell over in the kiln, oh well, it was still interesting!Dont Put Wet Rocks In A CampfireTheBackyardScientist2020-02-02 | Join the science discord! discord.gg/pw5sZ3PTye Ever heard of rocks exploding in a campfire? Can it really happen, and how dangerous is it? What happens if you spill molten metal on concrete? Today we will look at how and why concrete and rocks spall during a fire.
Song 1 - treat yourself (youtube music library) Song 2 - the good old days (youtube music library) Song 3 - “Happy” from soundcloud.com/mbbofficial
amazon affiliate disclaimer: Backyard scientist is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com.Melting and combining 19 elements! Does it make a Super-Alloy?!TheBackyardScientist2019-12-07 | Join the science discord! discord.gg/pw5sZ3PTye Viewers of my show get their first box free by going to the URL https://www.kiwiCo.com/BackyardWe made a Drone to Toilet Paper houses!TheBackyardScientist2019-11-22 | Join the science discord! discord.gg/pw5sZ3PTye We made a drone to toilet paper peoples houses! I'm thankful for all my viewers and I wanted to share a little gratitude back. Go to outloudmerch.com/bys & use code SCIENCE at checkout to get 15% off my merch through 12/2. There's new youth sizes as well!Plugging things in that SHOULD NOT be plugged inTheBackyardScientist2019-11-09 | Join the science discord! discord.gg/pw5sZ3PTye I was curious what would happen if you plugged in a subwoofer so thats how this video was born. Then I plug in a hotdog, electrify a can of shaving cream, tickle a pickle (with 120 volts), and show you my new method of rapid plasma assisted material removal on a can of lighter fluid.Potato cannon powered glider!TheBackyardScientist2019-10-23 | Join the science discord! discord.gg/pw5sZ3PTye My friend & I collaborated in Dropbox Paper to build a collapsible glider for a potato cannon! Visit http://bit.ly/DropboxPaper_BS to learn more about this free tool. #DropboxAmbassador
You can find the 3D files on my website https://www.backyardscient.ist/foam-gliderIs Molten Aluminum Bulletproof?TheBackyardScientist2019-09-30 | Join the science discord! discord.gg/pw5sZ3PTye Go to wix.com/go/Backyard to create your own free website! Get 15% off a yearly premium plan with my code "Backyard15" Check out my website here - https://backyardscient.ist
I was curious if molten aluminum is bulletproof, and now you are too!Gallium Vs High Pressure TankTheBackyardScientist2019-08-24 | Join the science discord! discord.gg/pw5sZ3PTye Viewers of my show get their first month of any subscription ($19.95 value) for FREE -- head to https://KiwiCo.com/Backyard to check it out! twitter.com/ChemicalKevy instagram.com/backyardscientistofficialImpossible Water Fountain - DIYTheBackyardScientist2019-08-06 | Join the science discord! discord.gg/pw5sZ3PTye Go to wix.com/go/Backyard to create your own free website! Get 15% off a yearly premium plan with my code "Backyard15" Check out my website here for a parts list - https://backyardscient.ist
Pump: -620 G.P.H.+ Take your pick from one of these. smile.amazon.com/s?k=600gph+pump&ref=nb_sb_noss_1 The height of the fountain is a function of the pump output and the nozzle size. If you get a bigger pump you can get a larger waster size for a fatter column of water or a skinny nozzle for a higher column of water.
Heres the cool water balloons i used in the video amzn.to/2llGiTH amazon affiliate disclaimer: Backyard scientist is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.comIts like Liquid Nitrogen - but Fire!TheBackyardScientist2019-06-14 | Join the science discord! discord.gg/pw5sZ3PTye I've always wanted to try these experiments! Hope you enjoy :) Sometimes I get comments wondering where I get my shirts and stuff from Hawaiian Shirt Shirt - amzn.to/2Ifo1Al Hawaiian Shark Shirt (from ballista video) - amzn.to/2MYMG0O 10L Liquid Nitrogen Dewar - amzn.to/2IgLJwb Insulated glass bottle - amzn.to/2XlRyRC My Camera - amzn.to/2WGfx9J
Giant Air Plant information: Its scientific name is Tillandsia utriculata. They are called 'air plants' because they typically live in trees. People sometimes think the name means they can survive air alone, but thats wrong! they still need water and nutrients (typically from decaying leaf litter they collect). They don't have a very high survival rate on the ground, and tend to die from staying wet for too long. Im just trying to raise awareness because I see people throwing them out or mowing over them all time time and there are very few left in my area. https://entomology.ifas.ufl.edu/frank/savebromeliads/floridas-bromeliads/Tillandsia-utriculata.html morningwoodgrowers.com/about-us/endangered/tillandsia-utriculata-aka-giant-wild-pine.html
amazon affiliate disclaimer: Backyard scientist is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com.I made the Scorpion From GAME OF THRONES and its CRAZYTheBackyardScientist2019-05-26 | Join the science discord! discord.gg/pw5sZ3PTye Get your first audiobook and 2 Audible Originals free when you try Audible for 30 days. Visit http://www.audible.com/backyard or text backyard to 500500Fortnite Boom Bow IRL - BOOM or BUST?TheBackyardScientist2019-04-24 | Join the science discord! discord.gg/pw5sZ3PTye How could you pass up trying a Boom Bow IRL? It was fun, and a noise maker for sure! Instagram - instagram.com/backyardscientistofficial Twitter - twitter.com/ChemicalKevy Facebook - facebook.com/TheBackyardScientistOfficialBurning stuff with a giant fresnel lens + how a DLP projector worksTheBackyardScientist2019-04-04 | Join the science discord! discord.gg/pw5sZ3PTye Hey everybody! Ive wanted to make one of these forever. Well, i have made one before but it was not a 'good' fresnel lens. If you want to learn more about fresnel lenses this is a good website - rimstar.org/equip/fresnel_lens.htm They have a youtube channel too with lots of educational content. youtube.com/user/RimstarOrg
And of course shoutout to The King of Random where i first saw this idea ! youtube.com/watch?v=jrje73EyKagHandheld Induction Heater Melts a Lock!TheBackyardScientist2019-03-10 | Join the science discord! discord.gg/pw5sZ3PTye Go to wix.com/backyard to get started on your no cost Wix website today -- maybe it's for a science fair, resume, or portfolio! And check out my Wix website for more info on the induction heater! https://www.backyardscient.ist/induction-heater
Ive always wanted to make my own induction heater, but this one is only the beginning. Im planning to make a more powerful one to do more stuff with molten steel!
I wanted to expand on a concept I explored in two previous videos but this time go BIGGER. I would say it worked better in the first videos though! You just can't compete against a classic 1oz lead big boi.
Previous videos in the series youtube.com/watch?v=dhbWfhBDNzk youtube.com/watch?v=T85d7ST2yxUPouring lava in my pool!TheBackyardScientist2019-01-24 | Join the science discord! discord.gg/pw5sZ3PTye Go to wix.com/backyard to get started on your no cost Wix website today -- maybe it's for a science fair, resume, or portfolio! And check out my Wix website at https://backyardscient.istCan Spiderman Climb The Sticky Wall?TheBackyardScientist2019-01-08 | Join the science discord! discord.gg/pw5sZ3PTye I still had 2 gallons of glue from the last glue trap video, so I thought this would be a great way to use the rest of it! I forgot how gross the glue really is though, I practically need to shower in WD-40 to get if off. 😰I had to re-upload because it was stuck on 360p but its working now!Fully-Automatic Table Saw CannonTheBackyardScientist2018-12-29 | Join the science discord! discord.gg/pw5sZ3PTye I got a lot of feedback from my last video. Now the table saw is back with FULL AUTO more explosions, and i shoot randy. Table saw vs christmas ornaments, oobleck, fish tank, balloons, and soda.
Codys Lab video - youtube.com/watch?v=MTHhRkLLYJ4This Is Why You Need To Wear Safety GlassesTheBackyardScientist2018-12-09 | Join the science discord! discord.gg/pw5sZ3PTye Go to https://NordVPN.com/backyard and use code BACKYARD to get 75% off a 3 year plan and an extra month for free. Protect yourself online today!
Today I show you how dangerous table saw kickback can be, as well as how angle grinders can shatter and why its important to be safe with power tools!Do Not try to charge a LiPo Battery like this!TheBackyardScientist2018-11-18 | Join the science discord! discord.gg/pw5sZ3PTye This is what happens when you ignore the warnings on a Lithium (LiPo) Battery. First I tried Disassembling the battery to learn about it. Then I tried shocking the battery with a tesla coil. Surprisingly that did not work, so I connected it to a car battery to overcharge it and it worked great. Of course, by working great i mean it caught on fire. Finally I incinerated the battery with a 30W infrared laser in a fishtank filled with 100% pure oxygen.Can a Camera Stream its own Destruction?TheBackyardScientist2018-10-26 | Join the science discord! discord.gg/pw5sZ3PTye I saw this video on reddit and was suspicious it was fake. I thought if you pew pew your phone it would instantly break, so I decided to try it to for myself! Reddit link reddit.com/r/Whatcouldgowrong/comments/9ejgcv/wcgw_if_i_play_with_a_gun_on_instagram_live
Ok guys, no insults or personal attack will be allowed in the comments. keep it clean. this video is a learning example for following the rules of handling a gun, not a witch hunt. #1 THE GUN IS ALWAYS LOADED. dont play with guns. don't point guns at stuff you don't want to shoot. instagram.com/backyardscientistofficial twitter.com/ChemicalKevy the gun - pyramydair.com/s/m/Hatsan_AT44_10_Long_QE_Air_Rifle/3390 KEEP READING! The phone can not record to the SD card or internally fast enough either. I filmed the second shot from the phone, and the video is corrupted. I used a free app to preview the file, and it does not show the last few frames before i shoot the gun. here is the file. drive.google.com/file/d/1nzQonW9JhQny5HWE8UpWnDfmWjcFZcdY/view?usp=sharing use mp4 fixer on android to view the file if you want to see for your self.Supersonic Rubberband Whip - Easy Fun DIYTheBackyardScientist2018-10-04 | Join the science discord! discord.gg/pw5sZ3PTye I had a bunch of fun at Maker Faire NYC! I saw a lot of really neat builds, tools, workshops and displays, but the rubber band whip really stood out as something easy and fun anybody can do. Maybe im still a 12 year old at heart but I think this thing is a blast. And it breaks the sound barrier WITH RUBBER BANDS!
Referenced Videos: Fire Whip - youtube.com/watch?v=jMFL3UQ06FU Schlieran imagry - youtube.com/watch?v=lbomsOPSSIIDIY MEGA Microwave! - Microwaving a MicrowaveTheBackyardScientist2018-09-20 | Join the science discord! discord.gg/pw5sZ3PTye This video was sponsored by Google Science Fair. Enter the 2018 Google Science Fair at bit.ly/2ODMRLc and check out their YouTube page at youtube.com/user/GoogleScienceFair/featured. Don't try this at home. See official rules for full details: bit.ly/2MNOgggCan a Person escape a human-sized Glue Trap?TheBackyardScientist2018-09-05 | Join the science discord! discord.gg/pw5sZ3PTye After struggling with my mega-microwave I decided to have some fun. I got 4 gallons of bulk glue for mouse traps because I was curious if a person could escape from a human-sized glue trap. I never saw anybody try it before so I was curious. At first I thought about getting a few hundred of the regular sized glue traps from the store and stapling them to the plywood but decided the bulk glue would be more economical and cover more surface area. It was not a cool color like the stuff in the store but I don't mind.
I had fun, thanks for watching!
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thanks to Wix for sponsoring this videoWhat happens when a NERF dart breaks the SPEED OF SOUND?TheBackyardScientist2018-04-29 | Join the science discord! discord.gg/pw5sZ3PTye The first 1,000 people to click will get 2 months of Skillshare Premium free: http://skl.sh/backyardscientist
A few more thoughts on the Nerf Cannon. Yes, I know if I used a longer barrel I could get higher speeds, but I did not want to deal with a 20ft long gun. I think a 6ft barrel was enough to show what a supersonic nerf dart can do.
Davekni got a pingpong ball going 2000mph which is 2930 ft/s!! (mach 2.5). His barrel was 20ft long. It can shoot through 3/4in plywood! You can see that video here- youtube.com/watch?v=5xuwu4gjNbQ
I always thought the speed of sound was the limiting factor, because the flow 'chokes' at mach 1. Its a big controversy among air-gunners, and theres like a 900 post topic on it here gatewaytoairguns.org/GTA/index.php?topic=102604.540. Some guy got one going like 2100 ft/s which I thought was impossible. youtube.com/watch?v=qUq4OQqZ2bw So it prompted me to do some research.
It turns out flow does choke at mach 1, but its only the mass flow that chokes. The gas can still expand supersonically.
Also a big thanks to Dr. Carl Knowlen from University of Washington, and u/Overunderrated, u/TheQueq, and u/InductorMan from reddit.
THE THEORY OF HIGH SPEED GUNS http://www.dtic.mil/dtic/tr/fulltext/u2/475660.pdf Probably the most extensive on the subject "The reader Is assumed to be an advanced student in engineering." I hope you payed better attention in physics that I did.