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Remaking History: James Watt and the Flyball Governor

Remaking History: James Watt and the Flyball Governor

In 1764, scotsman James Watt grew thoughtful as he tinkered with the machinery associated with his job as a steam engine technician. The main problem with those early steam engines, called Newcomen engines, was that they were terribly inefficient. They were a step up from draft horses, but Newcomen engines went through coal like a […]

Build A Water Quality Tester You Can Hear

Build A Water Quality Tester You Can Hear

Can you be electrocuted in the bathtub? Sure — but only because the water’s not pure. Many people don’t realize that absolutely pure water doesn’t conduct electricity. This is because the hydrogen and oxygen atoms don’t have free electrons. In a typical domestic water supply, it’s the impurities such as sodium, calcium, and magnesium salts […]