In this project you'll learn about how digital image files are encoded, and how digital images can be compressed so that the files take up less storage space and can be transmitted more quickly. You will also measure the quality of...

In this project you'll learn about how digital image files are encoded, and compressed. You will also measure the quality of compressed and uncompressed images, which will give you important insights into the tradeoffs between file size...

Find detailed notes on CPR. Includes information on the function of rescue breathing and chest compressions and steps for performing CPR on adults and on infants.

This helpful tutorial on image types primarily focuses on JPEG and TIFF images and discusses compression as well as image format.

A collection of free learning activities that teach computer science through games and puzzles that use cards, string, crayons and lots of running around. The activities introduce students to computational thinking through concepts such...

Sound is defined and characterized as a wave consisting of oscillations in pressure of a medium. Includes graphics and links to further information.

This site offers a variety of everyday activities and everyday experiences in which waves or sound waves play a role.

Learn about the full sweep of U.S. history at this comprehensive site based on a PBS series and telecourse. The series compresses several centuries of events, issues, and people in U.S. history into twenty-six half-hour programs. A team...

This simulation allows students to interact with different components of a complex real world phenomenon. The simulation shown is of a 4-stroke internal combustion engine. The thermodynamic cycle being simulated is the Otto cycle, which...

Sound! How does it work? All you need to know about it is found here through a series of Q&As. Educators will find useful lesson plans.

This is a detailed biography about George Westinghouse with a link to an article about Westinghouse from the Wilmerding News, 1904. Read about his many inventions that improved railroad safety.

The different types of earthquake waves are discussed and illustrated. Features geologist video clip.

Learn CPR statistics, why CPR is important and who it can help with the fact sheet. A link to a how-to video is included in the article.

Link to nine major physics topics and dig deeper into the content. Find out about the work of scientists in each field and see example physical science experiments.

This site provides a brief overview of the invention of the refrigerator.

This site explains the basic concepts of pneumatics, which is often used in manufacturing.

This site has several lessons all about sound. It introduces sound, then covers major principles of waves and the wave equation. Each lesson has interactive activities to keep you interested, and there are even some test questions.

This tutorial looks at the three common image formats used on the web: GIF, JPEG and PNG. You'll learn how these image formats work, and where to use each type of image in your web pages.

This resource provides a detailed discussion about how refrigerators work. Also includes a history of the invention of refrigerators, and the physics behind how they work.

This site from the Colorado State University discusses the Otto cycle of a car engine. Includes a highly mathematical treatment of the efficiency of such engines. Includes a link to a java applet investigating the efficiency of such...

A question and answer format is used to relate elastic potential energy to the bounce of a rubber ball. Explanation of this simple phenomenon is thorough, complete, and free of trite statements.