Kakak2 Kimia mudah2an mau bantu menjelaskan lebih detail. pic.twitter.com/AN6kjvzyNcby Taboolaby TaboolaSponsored LinksSponsored LinksPromoted LinksPromoted LinksYou May LikeVikings: Free Online GamePlay this for 1 minute and see why everyone is addictedVikings: Free Online GameUndoTruthFinder People Search SubscriptionOne Thing All Liars Have in Common, Brace YourselfTruthFinder People Search SubscriptionUndoAncestryThe Story Behind Your Last Name Will Surprise YouAncestryUndoClassmatesSearch For Any High School Yearbook, It’s Free.ClassmatesUndoInsured NationThis Rule in Rowland Heights, California Leaves Drivers ConfusedInsured NationUndoGundry MD SupplementsTop Cardiologist: This One Thing Will Properly Flush Out Your BowelsGundry MD SupplementsUndo — Semesta Sains (@semestasains) June 7, 2019 An instructor and two children pour three cups of powder into a bin of red liquid. Suddenly — poof — a cloud of what looks like cotton candy explodes toward the ceiling. This popular video on Twitter comes courtesy of the Malay-language account w, which shares science content. But what is going on in the video? It’s a rather dangerous version of a classic chemistry demonstration, according to Brian Hostetler, an educator at the Denver Museum of Nature & Science. The reaction is typically known as “elephant’s toothpaste,” due to its foamy appearance, and it’s commonly used in chemistry classrooms to explain catalysts, Hostetler told Live Science. [Elementary, My Dear: 8 Little-Known Elements]Headbutting Tiny Worms Are Really, Really LoudThis rapid strike produces a loud ‘pop’ comparable to those made by snapping shrimps, one of the most intense biological sounds measured at sea.Your Recommended PlaylistVolume 0%Press shift question mark to access a list of keyboard shortcutsKeyboard Shortcutsplay/pauseincrease volumedecrease volumeseek forwardsseek backwardstoggle captionstoggle fullscreenmute/unmuteseek to %SPACE↑↓→←cfm0-9接下来播放Why Is It ‘Snowing’ Salt in the Dead Sea?01:53 facebook twitter 发邮件 reddit 链接https://www.livescience.com/65793-cotton-candy-explosion-explained.html?jwsource=cl已复制直播00:0000:3500:35 Easy but explosive The reaction uses cheap, easy-to-access ingredients: hydrogen peroxide, dish soap, potassium iodide and food coloring. Hydrogen peroxide is key. It’s made up of two hydrogen and two oxygen molecules. The bonds between these molecules naturally break, so over time, hydrogen peroxide slowly becomes water and oxygen gas. That reaction happens faster when exposed to light, Hostetler said, which is why hydrogen peroxide is sold in brown bottles. Normally, the slow breakup (or decomposition, in chemistry terms) of hydrogen peroxide into water and oxygen is unnoticeable. But the elephant’s toothpaste experiment speeds the process with a catalyst, a chemical compound that increases the rate of a given reaction. Potassium iodide — a salt of iodine, and the dietary supplement that’s used to add iodine to table salt — provides that catalyst. “In the presence of potassium iodide, hydrogen peroxide decomposes almost immediately,” Hostetler said. The setup is simple. Hydrogen peroxide is mixed with dish soap, and food coloring is often added for a dramatic effect (which explains the cotton-candy pink in the Twitter video). The potassium iodide is added, and the iodide ion that’s part of that compound attracts the oxygen in the hydrogen peroxide, breaking the bonds and rapidly transforming the hydrogen peroxide into water and oxygen gas. The oxygen molecules then get trapped by the soap, forming bubbles, Hostetler said. In a step sometimes added to the elephant’s toothpaste demonstration, a glowing splint — a strip of wood that is hot but not burning — that is inserted into the bubbles will catch alight, sparked by the pure oxygen. Toning it down Usually, Hostetler said, the elephant’s toothpaste experiment creates an oozy concoction. So why did the Twitter version send bubbles flying toward the ceiling? That particular reaction was due to the strength of the ingredients and the shape of the containers, Hostetler said. A fairly safe version of the elephant’s toothpaste demonstration can be done at home with 3% hydrogen peroxide bought from the drugstore, with yeast as the catalyst (yeast contains the enzyme catalase, which also breaks down bonds in hydrogen peroxide). The combination will ooze and get a little warm as the reaction releases heat, but other than the need to take care not to touch the “toothpaste,” as hydrogen peroxide can be irritating to skin and eyes, this DIY version is pretty safe. The Twitter video probably shows the reaction with 30% hydrogen peroxide, or even stronger, Hostetler said. The demonstrator also uses potassium iodide that’s in powder form instead of mixed into water. And he has it poured in three batches at once into a large container with a lot of surface area, so the reaction happens across a large amount of hydrogen peroxide all at one time. That makes the scene in the video “super-duper dangerous,” Hostetler said. Thirty percent or higher hydrogen peroxide can cause chemical burns on the skin, he said, and the reaction could heat the solution by hundreds of degrees. It’s that heat and steam from the reaction that floats some of the foam skyward in the Twitter video. The bottom line, Hostetler said, is not to try the jumbo version of the demonstration at home – but feel free to press “play” again on Twitter. “It’s a cool video,” he said. Wacky Physics: The Coolest Little Particles in Nature Creative Genius: The World’s Greatest Minds Top 10 Greatest Explosions Ever Hidrogen Peroksida dicampur katalis Potasium Iodida akan mengalami dekomposisi yg sangat cepat. Bagaikan mengundang iblis dari neraka tanpa mantra, reaksi ini disebut “The Elephant’s Toothpaste”. Originally published on Live Science.
Naomh Muire will host a Cúl Camp from the 27th June – 1st July. This Camp is for Primary school children aged between 6 to 13 years old. The camp will run from 10am until 2.30pm each day. For more details, please see our Facebook page or the Cúl Camps website. Another summer camp will follow later in July, details to follow.This week’s lotto numbers: 2,4,12,23 We had eight match 3 winners: Donal Rua (Ranafast), Ciaran mc Ginley (Calhame), Michelle Mc bride (Calhame), Hugh Sharkey (Calhame), Grace Boyle (Mullaghduff), Mamie Gillespie (Mullaghduff), Mary mc bride (Mullaghduff), Patrica Mcbride (Annagry Cafe). Next weeks jackpot is €2180, remember if you’re not in you can’t win! Play our weekly club Lotto online at: www.naomhmuire.ie.The club are running a bus to the Donegal v Monaghan semi final on Saturday evening, to book a seat text 0876684200 with your name, bus prices are: €20 for Adults, €15 for u18s and €10 for u12s.Great news as the club have been recognised by the Donegal Volunteer Centre for our work in Health and Wellbeing initiatives over the past year and club members Seamus Rodgers and Tony Doherty will also receive awards for their outstanding and lifelong volunteer work in the club and community!Awards will be presented at the Mount Errigal Hotel in Letterkenny on Wednesday 22nd of June at 11am! Congratulations!! NAOMH MUIRE DUO SET TO BE HONOURED FOR SERVICES TO CLUB AND COMMUNITY was last modified: June 21st, 2016 by Mark ForkerShare this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Pocket (Opens in new window)Click to share on Telegram (Opens in new window)Click to share on WhatsApp (Opens in new window)Click to share on Skype (Opens in new window)Click to print (Opens in new window) Tags:GAANAOMH MUIRESport
Hello, I’m writing second articles to Shao Bo and new year.
years ago to help a customer site diagnosis, the other is the industry website of a company investment, invested a lot of advertising is also good, but the user has to walk stay, let me help him judgement is wrong. The friends who have read my article all know that I plan to make websites and advocate three big blocks of users, brands and profits. These three blocks need to be embodied and expressed. Website user problems needless to say the main reason is certainly the content of the website viscosity is not enough, the reason why users visit your site because the site is what he needs, if the user is advertising and the title attracted but can not find what he wants naturally go.
Guan Jian is content to attract users to retain users, no user brand, profits are the clouds, this shows the importance of content planning, then how can we plan to attract users and retain users content? Sb think website content planning in essence, Jane, three key words deep.
website content planning of the "fine" word:
what is "essence", "fine" is not much, do not spend not miscellaneous, the content of the web closely related to the theme and brand of the website. Website planning must be closely related with the website brand, column content must be closely related with the title, all in order to reflect the brand value, brand on the theme, can not avoid the column, can not do the content to do. Suggest that you can go to see, push, push a column and content, a good embodiment of "fine" word.
fine beauty is to make the site more professional, more accurate user groups, reducing the site operating costs and workload. Many websites have a very attractive and can reflect the value of the brand name, but because the operators in the planning is not "fine" is a strength of consciousness, want to do a comprehensive website that the content is too wide to spend too miscellaneous, users feel this website and ultimately reduce the value of the brand The name falls short of the reality..
website content planning "Jane" word:
what is "Jane", that is, simple and clear. Web site to do simple, clear, open the user to see what the site is to do, and have their own things. Now, the popularity of the theme style website is best proof of this. The website does not need to have how complex at all, Sina homepage is so long, how many people can pull to the bottom to see, I have no anyway, want to see what, find what, direct point navigation column to go in. Baidu is so simple, what to find is what, everyone is happy to use him.
a lot of friends in the site planning to engage in home love too dense, want to put all the things are displayed on the home page, but the results of a thankless task, not only increases the volume of "slow down the speed of users is not necessarily love. The most important and valuable part of a web page is the navigation and browser framework. The 1024*768 part is the essence of the website. It must be carefully planned
About the AuthorJillian MarkowitzView more posts by Jillian Markowitz Last Updated Nov 16, 2017 by Jillian MarkowitzFacebookTwitterLinkedinemail RelatedSmeal College of Business Redesigns Online MBA ProgramStarting in Fall 2017, students looking to earn an MBA at the Smeal College of Business at Penn State University will have an opportunity to do so through their completely redesigned Online MBA program. The change in format, the school explains, was designed to create “a new program that is more flexible for adult…September 16, 2016In “Featured Region”Smeal Ranked by BusinessweekThe Penn State Smeal College of Business’s MBA Program has been ranked no. 2 in return on investment according to the latest Bloomberg Businessweek rankings. Businessweek based its return on investment measure on the cost of the program, two years of foregone wages and the average salary increase students experience…November 19, 2014In “Featured Home”Smeal Students Selected for Supply Chain ProgramThe Penn State Smeal College of Business is one of only two schools from which Burlington Stores, a national off-price retailer headquartered in New Jersey, actively recruits for its Supply Chain Leader Development Program. This leadership program for supply chain graduates is an 18-month program that introduces new graduates to…July 28, 2014In “Featured Home” Last fall, five Penn State Harrisburg students took their idea for a supply-chain management platform to the HackPSU Hackathon. After testing the idea there, they took it to the Penn State Smeal College of Business 2017 Supply Chain Entrepreneurship Pitch Contest. There, the team nabbed second place out of 26 competitors. They took this honor (and the $4,500 award that came with it), and flew to Amsterdam for the Thought for Food Global Summit.Smeal students Howie Anderson, Michael Li, Brandon Daubenspeck, Pranav Jain, and Alex Bouril, were eager to showcase their idea at the summit, as, according to Daubenspeck, helping people access food was “the perfect application for our platform.”The platform, NuntAgri, is a chatbot with which buyers, sellers, and distributors of food can interact. In its most recent iteration, NuntAgri enables sellers to input what they would like to sell, and buyers to text NuntAgri to peruse or purchase these orders. NuntAgri then contacts a close intermediary to transport the order. This efficient coordination allows produce and food items that would have been discarded to be picked up by volunteer drivers and taken to places like homeless shelters and food banks. Michael li explains the platform as, “a service offered through SMS, short message service, that can revolutionize regional distribution logistics by using crowd-sourcing.”The summit was a fruitful next step for the team, as NuntAgri’s capabilities align with Thought for Food’s goal of feeding nine billion people in the next thirty years. As of now, however, the platform is being used by Dirty Dog Hauling, a Harrisburg company that specializes in junk removal. Just as it would with food, the chatbot connects sellers, transporters, and buyers of the junk items.“This has been an excellent experience,” Li said. “We have learned how to make connections, how to network and develop a system that will effectively manage supply and demand.” Penn State Startup Week Contest Helps Launch Platform to Fight Hunger regions: Philadelphia