Slipping and Rolling Wheel
The EJS Slipping and Rolling Wheel Model shows the motion of a wheel rolling on a floor subject to a frictional force as determined by the coefficient of friction ?k. The simulation allows the user to change the initial translational and rotational velocities of the wheel, v and ?, and the mass, radius, and mass distribution, R, m, and C of the wheel. By controlling these variables, the dynamics of the wheel can be changed to show the sliding, then rolling without slipping, of the wheel.
Perpendicular lines. (Coordinate Geometry)
An interactive applet and associated web page that show how to determine of one line is perpendicular to another in coordinate geometry. The principle used is that if two lines a re perpendicular to each other the slope of one is the negative reciprocal of the other. The applet shows to lines that the user can move. The slopes are continuously calculated as you drag them, and if the they are parallel they change color. The calculation is shown on screen updated continuously as you drag. The grid
Trapezoid and its properties. (Coordinate Geometry)
An interactive applet and associated web page that show the definition and properties of a trapezoid in coordinate geometry. The applet has a trapezoid with draggable vertices. As the user re-sizes the trapezoid the applet continuously recalculates its altitude and median from the vertex coordinates. The trapezoid can be rotated on the plane to show the more complex cases. The grid, coordinates and calculations can be turned on and off for class problem solving. The applet can be printed in the
Ping 97: Azure & Toyota, Kinect Window, ICE, WP7 Challenge Back in action, Laura and Paul bring you the hottest stories that are being heard around Microsoft Campus this week. Stories include:
Reference Resources: Being a Good Detective
Students become familiar with a variety of reference resources when seeking information. These sources include atlases, almanacs, dictionaries, encyclopedias, thesauri, online search engines for the Internet, and online library card catalogs.
11.04.2011 – Langsam gesprochene Nachrichten
Trainieren Sie Ihr Hörverstehen mit authentischen Materialien. Nutzen Sie die Nachrichten der Deutschen Welle von Montag – als Text und als verständlich gesprochene Audio-Datei.Die Regierung des libyschen Machthabers Muammar al-Gaddafi hat nach Angaben der Afrikanischen Union (AU) einen Plan der Staatenorganisation zur friedlichen Beilegung des Konflikts mit den Rebellen akzeptiert. Der südafrikanische Präsident Jacob Zuma erklärte nach mehrstündigen Gesprächen einer hochrangigen AU-Del
Japan's History of Earthquakes
This 1:26 video reviews the most powerful earthquakes that have hit Japan in the past. Includes some statistics that might be of value, but at best an overview.
Meeting God: Elements of Hindu Devotion
This Web site, created to complement a AMNH exhibition, explores the third largest religion in the world, Hinduism. It includes the following sections:Elements of Hindu Devotion -- an in-depth look at worship in the home, community worship, temple worship, processionals, ephemeral shrines and images, sacred acts, and renunciation. Portraits of Worship -- a collection of eight annotated photographs that shows the personal shrines of Hindus, Sikhs, and Jains in and around New York. Resources -- a
Endangered!
This expedition guide was written as a self-directed tour for the temporary biodiversity exhibit that preceded the museum's Hall of Biodiversity. The site continues to serve as a terrific resource for understanding biodiversity.
Yellowstone: Monitoring the Fire Below
This interactive feature story is part of Science Bulletins, an innovative online and exhibition program that offers the public a window into the excitement of scientific discovery. Published in June 2006, this Earth Bulletin looks at the geologic history of Yellowstone National Park. It includes the following components: Three online essays - Yellowstone National Park Is a Volcano, Signs of Restlessness, and Volcanic Witness; An Interview with Bob Smith -- each available in a print-friendly for
Spirits in Steel: The Art of the Kalabari Masquerade
This Web site, created to complement a AMNH exhibition, explores the art of the Kalabari Masquerade.
Astro Viz: Colliding Galaxies
Our innovative Science Bulletins include interactive data visualizations that offer a three-dimensional journey through the cosmos. Published in September 2005, this Astro Viz takes a look at what happens when galaxies collide.
Watt meters to measure energy consumption
Students use watt meters to measure the power required and calculate energy used from various electrical devices and household appliances.
Engineering Bones
Students extend their knowledge of the skeletal system to biomedical engineering design, specifically the concept of artificial limbs. Students relate the skeleton as a structural system, focusing on the leg as structural necessity. They learn about the design considerations involved in the creation of artificial limbs, including materials and sensors.
Climate Change Graphics from the Hall of Planet Earth
This collection of Climate Change Graphics is from Earth: Inside and Out, part of the Museum's Seminars on Science series. These distance-learning courses are designed to help educators meet the new national science standards.
Arthur Ross Hall of Meteorites
This Web site, created to complement the Hall of Meteorites, looks at these fallen rocks and what they tell scientists about the formation of stars and planets.
Killdeer eggs
Killdeer are birds, and they lay eggs just like all other birds do. Killdeer lay their eggs on the ground, in gravel, on rooftops, or wherever the splotchy pattern of the eggs may be hidden best. The eggshells are hard for added protection.
Honeycomb
Honey is produced by bees. Humans collect it and use it in baking, to sweeten tea, and to spread on food.
Honey mesquite plant (Prosopis glandulosa)
The yellow seed pods are the fruit of the honey mesquite plant. While the ovules of the fruit are becoming seeds after fertilization, the flower becomes a fruit pod.
