What Is Coding?
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Safety in Extreme Climates
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Safe Transportation
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Safe Sports Equipment
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Safe Buildings
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Computer Programmer
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2.8 |
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Meteorologist
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2.9 |
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Wedges
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1.0 |
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Wheels and Axles
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1.1 |
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Cell Phones
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3.0 |
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The First Flight
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2.9 |
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The Internet
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3.0 |
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The Moon Landing
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2.8 |
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Inclined Planes
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1.0 |
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Levers
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1.0 |
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Pulleys
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1.0 |
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Screws
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1.0 |
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Motorcycles
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2.6 |
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Speedboats
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2.5 |
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Trains
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2.9 |
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Hot Air Balloons
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2.8 |
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Helicopters
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2.8 |
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Cars
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2.6 |
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Airplanes
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2.6 |
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