make an aa battery
Bookmarked 582 weeks ago
in this video well show how to make an aa batterywarning: potassium hydroxide is corrosive zinc is a heavy metal and manganese dioxide is an irritant wear gloves when handling themget a 5 ml plastic syringe the one i got was from a company called bd and the catalogue number was 309603 discard the plunger and cut off the tip also cut the back up to the 5 ml markget a 5 by 3 cm sheet of zinc metal about 05 mm thick cut into the 3 cm side a series of cuts about half a centimetre long roll the sheet so it fits into the syringe tube dont roll it too tight so it falls out it should be big enough that it stays in by frictiononce you have the right diameter pull it out and bend inward the tabs we cut earlierthis should now form a zinc canprepare the cathode powder by mixing 8 grams of manganese dioxide and 3 grams of carbon powder this will provide enough cathode powder to make about ten batteriesthe carbon is just a conductor for the oxidant which is the manganese dioxide the best manganese dioxide to use has the gamma type crystalline structure the more common beta type crystalline structure will still work but will give lower current so try and get the gamma type if you can if you make your manganese dioxide electrochemically then it will be of the gamma form while manganese dioxide made pyrolytically is usually of the beta formnow get some filter paper or a coffee filter and cut a rectangle about 5 by 10 centimetres to that pour a five centimetre line of about one gram of the cathode powder also insert a 7 centimetre length of 2 mm thick pencil lead into powder roll that into the paper and fold over one side so it doesn039t spill outnow get the zinc can we made earlier and insert the cathode roll into it cut off or tear any excess paper if there is too much cathode powder that it doesn039t fit then youll need to pour some off if there is too little then youll need to take it out and add morenow insert the assembly pencil end first into the syringe container from earlier make sure the pencil lead goes through the hole in the tip then break off the exposed pencil lead and leave 2 mm for electrical contactfill the battery with electrolyte by dropping the whole thing in solution of 30 g of potassium hydroxide in 50 ml of water leave it for several minutes to soak in and then take it out and leave it on some tissue for another several minutes to drain out any excessand thats your battery mine had an open circuit voltage of about 1412 volts and two of them could power a cheap digital clocknow i know some of you are wondering what the electrochemistry is behind the alkaline battery under load the zinc anode reacts with the potassium hydroxide electrolyte to give zinc oxide and two electrons these electrons then go through the load and at cathode they travel through the carbon to the manganese dioxide the manganese dioxide reacts with water to produce manganese iii oxide and hydroxide ions the reactions stops and the batteries dies when either the zinc or the manganese dioxide is consumed or when the waste products build up and block further chemistry

parkzone ultra-micro p-51 bnf
Bookmarked 770 weeks ago
links below this is a quick video of the parkzone ultra-micro p-51 bnf that i bought from horizon hobby in 2009 it is a full functional 4-channel airplane with a 110 ma battery i also bought a specktrum dx6i 6-channel full range transmitter that will work with other bind-n-fly planes and other models the p51 flies easy and will do loops until the battery runs low great for mid to experienced fliers i don039t know about beginners but maybeit has been two years since i039ve had this plane and all i039ve replaced is the spinner cone that broke off after a full throttle impact with a parking lot ouchit039s a little crinkled and the tail fin needs a stiffener but it flies as is it039s done cartwheels lots of quotbad landingsquot into the street and i039ve poked it out of the evil tree in my backyard a couple of timesgreat plane for small neighborhood parks fun durablehorizon hobby page for plane:http:wwwhorizonhobbycomproductsdefaultaspxprodid=pkz3680horizon hobby link to transmitter: http:wwwhorizonhobbycomproductsdefaultaspxprodid=spm6600

iphone 5 back cover or middle platea new iphone part leaked
Bookmarked 714 weeks ago
new iphone component maybe for iphone 5 but it is neither a battery door nor a middle pate it is a integrated part great changes in the design for more information please refer to http:wwwetradesupplycom

launch of betterplace european center battery switch process
Bookmarked 780 weeks ago
http:wwwtechnologicvehiclescom

bbc shock and awe: the story of electricity 13 - spark 2011
Bookmarked 716 weeks ago
professor jim al-khalili tells the electrifying story of our quest to master nature039s most mysterious force - electricity this series tells of dazzling leaps of imagination and extraordinary experiments - a story of maverick geniuses who used electricity to light our cities to communicate across the seas and through the air to create modern industry and to give us the digital revolution1 episode 1: spark episode one tells the story of the very first 039natural philosophers039 who started to unlock the mysteries of electricity this is the story about what happened when the first real concerted effort was made to understand electricity how we learned to create and store it before finally creating something that enabled us to make it at will - the battery

bbc shock and awe: the story of electricity 23 - the age of invention 2011
Bookmarked 716 weeks ago
professor jim al-khalili tells the electrifying story of our quest to master nature039s most mysterious force - electricity this series tells of dazzling leaps of imagination and extraordinary experiments - a story of maverick geniuses who used electricity to light our cities to communicate across the seas and through the air to create modern industry and to give us the digital revolution2 episode 2: the age of invention just under 200 years ago scientists discovered something profound that electricity is connected to another of nature039s most fundamental forces - magnetism in the second episode jim discovers how harnessing the link between magnetism and electricity would completely transform the world allowing us to generate a seemingly limitless amount of electric power which we could utilise to drive machines communicate across continents and light our homes this is the story of how scientists and engineers unlocked the nature of electricity in an extraordinary century of innovation and invention

bbc shock and awe: the story of electricity 33 - revelations and revolutions 2011
Bookmarked 716 weeks ago
professor jim al-khalili tells the electrifying story of our quest to master nature039s most mysterious force - electricity this series tells of dazzling leaps of imagination and extraordinary experiments - a story of maverick geniuses who used electricity to light our cities to communicate across the seas and through the air to create modern industry and to give us the digital revolution3 episode 3: revelations and revolutions electricity is not just something that creates heat and light it connects the world through networks and broadcasting after centuries of man039s experiments with electricity the final episode tells the story of how a new age of real understanding dawned - how we discovered electric fields and electromagnetic waves today we can hardly imagine life without electricity - it defines our era as our understanding of it has increased so has our reliance upon it and today we039re on the brink of a new breakthrough because if we can understand the secret of electrical superconductivity we could once again transform the world

burning new smartphone oukitel k6000 - not catch fire
Bookmarked 534 weeks ago
do you hear cell phones of whatever brand do catch fire this video will tell how to burn a beverage can a normal smartphone and ouktiel k6000 and show whether they will catch fire or survive from it maybe you don039t believeoukitel k6000 equipped with a massive of 6000mah big battery support reverse charging 6 devices at the same time and fully charged from 0 to 100 within 2 hours because of the quick charge technology will it catch fire and melt the smartphone itself watch nowofficial facebook fanpage: wwwfacebookcomoukitelmobilemore details of k6000: wwwoukitelccproductsuniverse20151093html

kennesaw - atlanta bmw mercedes lexus mechanic repair -service - diagnostic call 770-431-0303
Bookmarked 621 weeks ago
kennesaw - atlanta luxury auto body and mechanic for service call 770-431-0303 what sets us apart from the noise and clamor of our competition georgia luxury automotive is built on a foundation of honesty and respect for our craft our customers and our integrity our team works hard every day to prove that high quality customer service is not a concept of the past call us at 770-431-0303 or you can visit our website at http:georgialuxuryautomotivecom for more information

tsa nabs suspected al queda terrorist at o039hare international airport a toddler in a wheelchair
Bookmarked 726 weeks ago
a toddler in a wheelchair is stopped by the tsa at ord o039hare airport in chicago and forced to into a sequestered area on his way to a family vacation in disney this 3 year old boy is in a body cast for a broken leg despite assurances from his father that quoteverything is okquot he is physically trembling with fear while he watches his two siblings mother father grandfather and grandmother pass through along with everyone elseonly to be singled out he simply does not understand what is happening and whyhttp:wwwmattonaircom

air-conditioned clothes help global warming
Bookmarked 754 weeks ago
a japanese company is promoting air-conditioned jackets and shirts self-cooling clothes may seem like the stuff of science fiction but for this company they are good for businessshirts and jackets made by kuchou-fuku -- meaning quotair-conditioned clothesquot -- keep the wearer comfortable even in sweltering heattwo small fans sewn into the back of each garment are powered by a pocket-sized rechargeable battery pack the fans circulate air across the wearer039s skin evaporating perspiration and keeping temperatures down and all this while only using one-50th of the energy of a small air conditionerthis is a welcome respite from japan039s mid-summer humidity where the temperature has hovered around 38 degrees celsius recentlytoru ichigaya kuchou-fuku office worker:quotit feels cooler when you039re wearing this jacket than when you039re not wearing itquotanother worker yukie asano agrees saying that the bulky jacket allows her to work comfortablyyukie asano kuchou-fuku office worker:quotit almost feels like air is circulating inside my bodyquotthe tokyo company invented the air-conditioned garments eight years ago in a bid to help fight global warminghiroshi ichigaya ceo kuchou-fuku:quoti worry about global warming as the number of air conditioners in the world continues to increase i039d been trying to invent an air-conditioner that would require little energy and reached the conclusion that air-conditioning does not have to cool the whole roomquotthe self-cooling clothes come in 10 styles and a variety of colors they sell for about 96 us dollars

flying to a new country w no money amp surviving for 24hrs
Bookmarked 391 weeks ago
check out https:wwwinboardtechnologycom to get around your city like ammar :check out and subscribe to the super talented andreas hem:https:wwwyoutubecomuserandreasahemammar who usually thrives with convincing strangers to join him on wild adventures struggled hard for the first time he thought he039d be able to fly to a completely new country without money and convince people there to give him food and housing it didn039t really go like he has plannedspeaking of which if you want to join the yes fam facebook group which is 45000 of our most engaged and badass community members you can apply here: https:wwwfacebookcomgroups156535611858034every friday we send you a 1-minute read on what we039ve learned from starting a business seeking discomfort and living a more fulfilling life: http:yestheorycomnewsletterperfect royalty free music for youtube: free 30 day trial here: https:googlkojz12 yes theory spotify playlist: https:openspotifycomusert-b

don039t charge your phone to 100 here039s why
Bookmarked 325 weeks ago
these days our phones are basically part of us almost like your lift pinky while they are magical devices that can do pretty much anything phones arent invincible do you know for example that your phone uses the battery to search for reception this will seriously drain it by the way don039t let your phone lose its battery completely before you charge it just wait til it gets below that 30 line if you plug in your phone every time it gets a little below 100 eventually it will have a hard time recharging so check out these tips and tricks so that your cell can stay by your side for longerother videos you might like:stop charging your phone at night here039s why https:wwwyoutubecomwatchv=jnb4rdakw6k9 signs your phone isn039t your private zone anymore https:wwwyoutubecomwatchv=yhumnxawgckampstop using your phone sitting on the toilet https:wwwyoutubecomwatchv=h_zbgb5ybtiamptimestamps:get rid of old apps 0:20use low power mode 0:36if youre in an area with bad recepti

bmw electric maxi scooter e-scooter revealed part 1 on 2
Bookmarked 763 weeks ago
more infos: http:wwwtechnologicvehiclescomenactualite-mobilite-verte986video-un-maxi-scooter-electrique-le-bmw-e-sco

drone flight time
Bookmarked 441 weeks ago
one of the most important things about drones is the amount of time they can fly this is among the well-known specifications that everyone must check before buying their first drone for more information please visit our website: http:wwwdronesfellacomguidelong-flight-time