F-10 Curriculum (V8)
F-10 Curriculum (V9)
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Artificial lighting methods have changed with the invention of new lighting technologies designed to be more energy efficient and to reduce the use of resources. Since electricity has been used as an energy source, incandescent and fluorescent globes and, more recently, light emitting diodes (LEDs) have been used in our ...
Jet boats can go really fast. Instead of an outboard motor and propeller, jet boats have an inboard engine and they eject a jet of water out the rear of the boat. Watch this clip to see how they work.
Is it more fuel efficient to drive or fly between two places? Watch this clip and learn how to calculate the answer. What are the various factors that need to be taken into account? This video was made using the American measurement of gallons per hour, American firgures for the average number of passengers in a car and ...