Use this site to learn about basic gas properties including motion, viscosity, and compressibility. Includes links to activities for all ages.

Physics tutorial on measuring the speed of sound in dry air. An interactive form allows the student to practice solving problems involving the temperature dependence of the speed of sound.

The operation of conventional air conditioners are described. Their parts and the refrigerant/heat exchange cycle is discussed. The use of alternative geothermal systems are explained.

Science experiment in which you make a hovercraft, a machine that uses compressed air to do work, from a paper cup. Includes full list of materials, procedures, and scientific explanation of how air flow can minimize friction and cause...

This brief article on the life and contributions of George Westinghouse (1846-1914) includes a picture. Read about his air brake as well as his development of the alternating current system.

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

Great animations showing how sound is produced.

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.

Learners build rocket models designed for gaining the maximum height. They use a compressed air rocket launcher and 2-liter plastic bottles. They will also use an online simulator to help them make predictions and adjustments to their...

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