In a gas turbine, the linear motion of gas causes rotors to spin, ultimately creating electricity. The forward rotating blades pump air under high pressure into the combustion chamber where natural gas ignites on contact with the air. At 1,500 degrees Celsius, the stream of gas rushes past the rear turbine blades, causing the entire rotor to spin. A generator transforms that rotational energy into electricity. This program shows the extreme precision...

Physics is frequently one of the hardest subjects for students to tackle because it is a combination of two of the toughest subjects for most students: Math and Word Problems. What sets this series apart from other physics teaching tools is that the concepts are taught entirely through step-by step example problems of increasing difficulty. It works by introducing each new concept in an easy to understand way and using example problems that are worked...

Trace the origin of tides to the simple fact that gravity varies from point to point in space. This leads not just to the rise and fall of the ocean, but to the gradual slowing of Earth's rotation, Saturn's spectacular ring system, volcanoes on Jupiter's moon Io, and many other phenomena.

Physics is frequently one of the hardest subjects for students to tackle because it is a combination of two of the toughest subjects for most students: Math and Word Problems. What sets this series apart from other physics teaching tools is that the concepts are taught entirely through step-by step example problems of increasing difficulty. It works by introducing each new concept in an easy to understand way and using example problems that are worked...

Helicopters are so unlike fixed-wing aircraft in appearance and operation that it's hard to believe they work on the same aerodynamics principles. Focus on their ingenious rotor blades, which are rotating wings. Explore the challenge of flying a chopper, and learn why it's safer to lose power at altitude in a helicopter than in an airplane.

Apply concepts of lift and drag to propulsion, focusing on the internal combustion engine and propeller - still the most efficient power plant for aircraft flying at low speeds. Study the four-cycle engine and the design of propellers, which are rotating wings twisted to present an optimum angle of attack across their entire length.

Specifically designed for and correlated to the curriulum of a elementary school science course, this series explores key topics on Earth and Space and helps instructors to teach challenging concepts. The films, and accompanying teacher materials, are a great asset for teachers and teachers in training to use to integrate video into their lesson plans to capture the attention of young minds and enhance learning. The videos in the series include: Exploring...

35mm 1.33:1 color sound, 7:02 minutes; production assistance John Cage; music_Hungarian Rhapsody No. 2_by Franz Liszt; courtesy Warner Bros.,Turner Entertainment Co. A milestone in object animation, Fischinger manipulated hundreds of paper cutouts hung on invisible wires and shot a frame-at-a-time in close synchronization to Liszt's rhapsody. The dance of shapes resembles a voyage through an imaginary space where "the keen sensation of depth becomes...

Physics is frequently one of the hardest subjects for students to tackle because it is a combination of two of the toughest subjects for most students: Math and Word Problems. What sets this series apart from other physics teaching tools is that the concepts are taught entirely through step-by step example problems of increasing difficulty. It works by introducing each new concept in an easy to understand way and using example problems that are worked...

Our current industrial method of food production is increasingly viewed as an unsustainable system, destructive to the environment and public health. But what is the alternative? Fresh profiles the farmers, thinkers, and business people across the nation who are at the forefront of re-inventing food production in America. With a strong commitment to sustainability, they are changing how farms are run, how the land is cared for, and how food is distributed....