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Radioactive Decay: A Sweet Simulation of a Half-life PiccoloNamek [GFDL or CC-BY-SA-3.0], via Wikimedia Commons Purpose To demonstrate that the rates of decay of unstable nuclei can be measured, that the exact time that a certain nucleus will decay cannot be predicted, and that it takes a very large number of nuclei to find the rate of decay. Context This is the second lesson in a three-lesson series about isotopes, radioactive decay, and the nucleus. The first lesson, Isotopes of Pennies, introduces the idea of isotopes. To do this lesson and understand half-life and rates of radioactive decay, students should understand ratios and the multiplication of fractions, and be somewhat comfortable with probability. In this lesson, students will be asked to simulate radioactive decay by pouring small candies, such as plain M&M's® or Skittles®, from a cup and counting which candies fall with their manufacturer's mark down or up. This lesson can be done in two, 45-minute class periods. Planning Ahead Motivation Development Ask students: Assessment

How to Find Websites and Domains owned by a Person? Learn how you can find the other websites (or domain names) that are owned by some person using online lookup tools. Say you are on a website example.com and would like to know which other web domains are owned by the same person who owns that example.com website. Is it possible? Yes there are some easy workarounds (and tools) that can help you find domains owned by an individual or a company though you may not be successful on every hunt. Let’s give it a try! Step 1: Reverse Whois Lookups with Google When you register a web domain, your name, contact address, phone number and other details are stored with the domain in a public registry database that anyone can access online using a Whois Lookup tool. Go to whois.sc and enter the domain name that you are trying to research. "PHONE_NUMBER" site:whois.domaintools.com "STREET_ADDRESS" site:whois.domaintools.com Replace Phone Number or Street Address in the above search queries with the actual data from the whois database. /adsense=1234 Step 4.

CK-12 People's Physics Concepts 1. Units and Problem Solving Units identify what a specific number refers to. Keeping track of units can help you avoid mistakes when you work out problems. 2. One dimensional motion describes objects moving in straight lines. 3. This chapter discusses parabolic and projectile motion, acceleration, and velocity. 4. In this chapter, we explore forces and Newton's laws. 5. Forces which cause objects to turn around continuously in a circle are known as centripetal forces. 6. Isaac Newton in a triumph of brilliance declared that there is one law of physics that governs motion and he unified “earthly” bodies and “heavenly” bodies with the The Universal Law of Gravitation. 7. The total amount of motion in the universe is constant. 8. When any two bodies in the universe interact, they can exchange energy, momentum, or both. 9. The third conservation law is conservation of angular momentum. 10. The development of devices to measure time, like the pendulum, led to the analysis of periodic motion.

Pendulum Lesson Plans Reviewed by Teachers Why Select Other Criteria? Sometimes you only have 45 minutes to review participles before Tuesday's assembly, or you need curriculum you know was reviewed after a certain date. Duration: If curriculum authors indicate how long it takes to implement a resource, i.e. a 30-minute vocabulary exercise, a three-day science experiment, or a two-week expository writing project, we note it for you. If not, our teacher reviewers may indicate an estimated amount of time it would take. When you select a duration in this box, you'll see only resources with that stated duration. Resource reviews that do not include a duration will be excluded from the list. Reviewed After: Limit the resources you see to those reviewed since the date you choose by clicking the box and making a selection.

10 Best Android Apps for Men If a man wishes to thrive in today’s world, he needs to embrace new technology and new tools. For many men, their go-to, everyday tool is their cell phone. What was once just a device to make simple phone calls, now can be used to navigate cities, send emails, and even teach essential man skills. After just a few years on the market, the Android OS has spawned over 500,000 different apps that both entertain and help us be more productive. How To Tie a Tie This app offers simple step-by-step instructions on how to tie 12 different necktie knots. Animated Knots If you forgot how to tie the trusty knots you learned in Boy Scouts, The Animated Knots app is for you. A robust drink mixing app for the budding mixologist. (Free) Grill the perfect steak with this steak timer app from Omaha Steaks. The Men’s Health Workouts app comes preloaded with over 20 of the magazine’s most popular workouts. Harness your inner Bear Grylls with the U.S. (Free)

Radioactive Decay: A Sweet Simulation of Half-Life PiccoloNamek [GFDL or CC-BY-SA-3.0], via Wikimedia Commons Introduction In this simulation, you will use small pieces of candy marked on one side. They will be your “nuclei.” 1. 2. 3. 4. Analysis:1. Favicon - L'icône de votre site dans la barre d'adresse | CommentCaMarche Vous avez sûrement remarqué la présence d'une icône à gauche de l'URL dans la barre d'adresse de votre navigateur sur certains sites web ? Pour mettre en place ce type d'icône sur votre propre site web il n'y a rien de plus simple. Créer la favicon Il y a plusieurs méthodes : Pour la plupart des navigateurs Il suffit dans un premier temps de créer une image au format png ou gif (formats standards, à utiliser). Pour Internet Explorer Comme d'habitude, IE ne respecte pas les standards et n'utilise pas les images avec les bons formats. Pour créer une favicon animée ou générer simplement un fichier ICO Cet outil vous permettra non-seulement de générer un fichier ICO facilement mais aussi d'animer votre favicon et de faire défiler du texte si vous le souhaitez. Cliquez sur le bouton Parcourir... et choisissez une image se trouvant sur votre ordinateur. Vous pouvez aussi rajouter du texte qui défilera après votre icône, cela générera automatiquement une icône animée. Mettre la favicon en ligne Notes

20 Places to Find Free Books Online | Northern Cheapskate The following is a guest post by Bailey Harris. There are many different sites offer free books online. Within minutes, you could find enough reading material in the form of e-books and audio books to keep you and your family entertained for months, if not years. The following sites provide free books that can be enjoyed online, downloaded to your computer, or transferred to an e-reader or MP3 player. E-books Google Books – Google Books is a great place to find free classic books in the public domain. Read Print – Read Print makes thousands of novels, poems, and stories freely available online. Online Books Page – This University of Pennsylvania website lists over 800,000 books that can be read for free online. Project Gutenberg – Project Gutenberg was the first site to provide free e-books online and is still among the most popular. Bibliomania – Bibliomania offers more than 2,000 free classic books, plays, poems, and short stories. Audio Books Children’s Books

The Circulation Game Purpose of activity: To learn (or review) information about circulation. Basic science concepts covered: distribution of oxygen to cells and carbon dioxide to lungs via red blood cells, production of red blood cells in bone, delivery of sugar and protein to cells via the blood stream, delivery of wastes to the kidneys for disposal out of the body, the heart as the driving force that keeps the blood moving, the "map" of the circulatory system in and out of lungs, heart and body parts. Description: This is a two-team game that can accommodate 2-6 players (possibly 7 or 8). Players spin the heart spinner to find out how many beats the team gets that turn. Each player gets to move either a blood cell or a food or waste token towards its goal--either cells or the lungs or the kidneys. Target age group: ages 8-14 Materials needed: Copies of the pattern pages on white card stock, scissors, X-acto knife, clear packaging tape, colored pencils, white glue, thin cardboard (cereal boxes work)

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