Explore | Electromagnetism As of July 1, 2013 ThinkQuest has been discontinued. We would like to thank everyone for being a part of the ThinkQuest global community: Students - For your limitless creativity and innovation, which inspires us all. Teachers - For your passion in guiding students on their quest. Partners - For your unwavering support and evangelism. Parents - For supporting the use of technology not only as an instrument of learning, but as a means of creating knowledge. We encourage everyone to continue to “Think, Create and Collaborate,” unleashing the power of technology to teach, share, and inspire. Best wishes, The Oracle Education Foundation Multiple Choice Zombie Apocalypse Survival Game | Choice of Zombies You really aren't awake yet. You never are until at least your second cup of coffee, and this is only your first. You're having a hard time getting your eyes to focus. But it certainly looks like there's a man in your front yard, crouched down on all fours, gnawing at a leg. A human leg. Definitely. The man gnawing on the human leg suddenly stops chewing, as though some sound disturbs him. You've heard about the outbreak in Millbury, of course. But it seems the newscasters were at least a little right, because there's a zombie chowing down on a human leg in your front yard. Shit.
Flags of the World Welcome to Flags of the World Flags of the World (FOTW), founded in 1994, is the Internet’s largest site devoted to vexillology (the study of flags). Here you can read more than 59,000 pages about flags and view more than 118,000 images of flags of countries, organizations, states, territories, districts and cities, both past and present. Searching for Flags on this Website There are many ways to find flags on this website. Site Indexed by Country Site Indexed by Subject Search Site by Topic or Subject Search Site by Clickable Maps Other Search Methods Pages reached through the map indexIndex Page for vexillological (non-national) topicsInternational OrganizationsPages ordered by TitleSearch this site by keywordsSearch using the FOTW Search Engine PagePages ordered by date last updated Do you want to update or build your own copy of this site? FOTW Mailing List Call for Editors Interested in helping maintain this site? Contact the director for further information. FOTW and FIAV
9 Mental Math Tricks Math can be terrifying for many people. This list will hopefully improve your general knowledge of mathematical tricks and your speed when you need to do math in your head. 1. Multiplying by 9, or 99, or 999 Multiplying by 9 is really multiplying by 10-1. So, 9×9 is just 9x(10-1) which is 9×10-9 which is 90-9 or 81. Let’s try a harder example: 46×9 = 46×10-46 = 460-46 = 414. One more example: 68×9 = 680-68 = 612. To multiply by 99, you multiply by 100-1. So, 46×99 = 46x(100-1) = 4600-46 = 4554. Multiplying by 999 is similar to multiplying by 9 and by 99. 38×999 = 38x(1000-1) = 38000-38 = 37962. 2. To multiply a number by 11 you add pairs of numbers next to each other, except for the numbers on the edges. Let me illustrate: To multiply 436 by 11 go from right to left. First write down the 6 then add 6 to its neighbor on the left, 3, to get 9. Write down 9 to the left of 6. Then add 4 to 3 to get 7. Then, write down the leftmost digit, 4. So, 436×11 = is 4796. Let’s do another example: 3254×11. 3. 4. 5.
Gifts For Geeks Easy, Open and Affordable Web Conferencing and Webinars | Dimdim Learn Criss Angel Style Magic Tricks "Awesome, you're a great illusionist!" Criss Angel is a great entertainer, performing many stunning illusions. Here are some great Criss Angel style coin tricks that look like real magic! THE EFFECT: You place any coin on the palm of your open hand, giving a magical snap, it vanishes into thin air! Watch the effect, then learn it! Do you want to own all my tutorial videos? THE SECRET: Ok, ok the saying "nothing up my sleeve" does not apply here! Be warned the 'flick move' does take some practice. To achieve a good 'flick' place the coin on your palm and your middle finger and thumb (of the other hand) in a clicking position above and in front of the coin. As you click your fingers allow the finger to strike the coin. When you have finished the trick you can push both of your sleeves up, the coin will be taken up too in the fabric. Needless to say when performing this trick you need to wear long sleeves that are quite baggy, otherwise you will never pull it off!
Como se hace... How it's made is a series of short documentary videos showing how common everyday items are manufactured. If you have ever wondered how a certain thing is manufactured you should look no further and start watching these very informative and interesting videos that we have compiled in this collection. The collection currently holds well over 100 videos and we try to add new videos on a regular basis, if you have anything to contribute let us know. Here is a short list of our favorite How it's made videos to get you started, Milk , Potato chips , Drinking water , Copy paper , Jeans , Bubblegum . How It's Made: Carbon Fiber Baseball Bats Video We have already had a video showing how an ordinary baseball bat is made but in this video we will learn how a carbon fiber baseball bat is manufactured. How it's made: Darts Video In this How it's made we get to see how Darts are manufactured at a darts factory.
School experiments at the nanoscale Dilution and the sense of smell In the following experiment, suitable for ages 8 and above, food colouring is serially diluted, causing the colour and smell to fade gradually. The colour will fade more quickly that the smell, illustrating that even though our eyes cannot detect the chemical responsible for the colour, it is still present, as verified by the smell. In the same way as we use our eyes to see large things and our nose to smell small things, nanoscientists use special tools to analyse (and manipulate) things at the very small scale: the nanoscale. Atomic force microscopes can feel and move individual atoms, while special surfaces with nanotextures on them can repel water extremely efficiently. Introduction When introducing the activity, the following examples may help to illustrate how small the nanoscale is. Our nails grow 1 nm each second. Explain that the olfactory bulb of the brain is responsible for interpreting the smells that the nose detects. Materials Procedure Resources
Bullet Catch History Deaths Houdini Dorothy Dietrich Chung Ling Soo Penn & Teller Seguir el viaje de sus billetes Clouds: puzzling pieces of climate Essentially, clouds are visible masses of water droplets (or even crystals), suspended in Earth’s atmosphere. To study them, researchers divide them into categories. Thin and wispy clouds are called cirrus clouds. Cotton-puffs, or heaps of cotton-puffs, are cumulus clouds. Clouds are classified into different categories Image adapted from Russell et al. (2007); courtesy of the Institute of Physics Furthermore, clouds are classified according to their altitude into: low-level (up to 2000 m), medium-level (2000-6000 m), and high-level clouds (over 6000 m). So, why do clouds appear and disappear, and what determines their formation and precipitation? Cloud seeds Formation of clouds by convection (rising air): sunlight heats the ground so that the air above heats up and rises. Aerosols play an important part not only in cloud formation, but also in precipitation: they determine when and where it rains. In a pristine atmosphere, large raindrops quickly form and soon rain down. Acknowledgement
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