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2. Kelvin water dropper - Wikipedia

   en.wikipedia.org/wiki/Kelvin_water_dropper

   The Kelvin water dropper, invented by Scottish scientist William Thomson (Lord Kelvin) in 1867, [1] is a type of electrostatic generator. Kelvin referred to the device as his water-dropping condenser. The apparatus is variously called the Kelvin hydroelectric generator, the Kelvin electrostatic generator, or Lord Kelvin's thunderstorm.

3. Franklin's electrostatic machine - Wikipedia

   en.wikipedia.org/wiki/Franklin's_electrostatic...

   Franklin called this device an "electrical battery", [4] but that term later came to have a different meaning, referring instead to a set of one or more galvanic cells. At that time, the word "battery" was a military term for a group of cannons. [32] Franklin was the first to apply the terms "positive" and "negative" to electricity.

4. History of perpetual motion machines - Wikipedia

   en.wikipedia.org/wiki/History_of_perpetual...

   An engraving of Robert Fludd's 1618 "water screw" perpetual motion machine. The history of perpetual motion machines dates at least back to the Middle Ages. For millennia, it was not clear whether perpetual motion devices were possible or not, but modern theories of thermodynamics have shown that they are impossible. Despite this, many attempts ...

5. Did our science teachers tell us the truth about water ... - AOL

   www.aol.com/news/did-science-teachers-tell-us...

   This is why cyclones and tornadoes spin in different directions, depending on their position relative to the equator. The guide poured water into a tub and pulled the plug to drain the water into ...

6. Entertech - Wikipedia

   en.wikipedia.org/wiki/Entertech

   Entertech was a brand of battery-powered motorized water guns sold in the United States from 1985 to 1990 by the now-defunct LJN. [ 1 ] [ 2 ] [ 3 ] Unlike the colorful designs of many of the simple hand powered pump water guns of that time, most of the Entertech water guns were manufactured from black plastics with a matte finish to resemble ...

7. 55 Cool Tech Gadgets Our Gear Editors Loved Testing This Year

   www.aol.com/lifestyle/40-wildly-innovative-tech...

   Our team of gear and commerce editors field tested more than 100 tech gadgets this past year, spanning fitness, home, and everyday items. Here's our favorites.

8. Water-activated battery - Wikipedia

   en.wikipedia.org/wiki/Water-activated_battery

   Kits using copper-magnesium cells activated by water or the liquid sample itself are also in development. Another water-activated battery had been invented by Susumu Suzuki of Total System Conductor. Aluminium anodes are used on many water-activated batteries designed for use with salt water such as seawater.

9. AOL Mail

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   Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!