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How to check for dead batteries
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Dead or depleted batteries, especially cylindrical ones like AA or AAA batteries, can exhibit a unique behavior known as "bouncing" when dropped from a short height. This phenomenon is primarily due to changes in the battery's internal chemistry and physical properties as it becomes discharged. Inside a battery, there are chemical reactions that generate electrical energy. As a battery discharges and its chemical energy is depleted, its internal chemistry changes. One of the changes that occur is a reduction in the pressure of gases within the battery. This decrease in gas pressure can make the battery feel lighter, contributing to its bounce. As a battery discharges, its internal components, such as the cathode, anode, and electrolyte, unde ...
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90398 |
duddy |
9 years ago |
Attention paleo dieters
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A new study suggests that humans who live in industrialized societies don’t have the guts to stomach a real hunter-gatherer diet. Compared with hunter-gatherers, industrialized peoples’ intestines have fewer kinds of microbes - and are missing at least one major group of ancient bacteria.
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51564 |
duddy |
9 years ago |
The Eshima Ohashi bridge
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The Eshima Ohashi bridge in Japan has a 6.1% grade ramp up! The bridge is also the third largest ridge bridge in the world and stretches about a mile long with a height of about 144 feet.
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25554 |
duddy |
8 years ago |
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21135 |
duddy |
9 years ago |
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18120 |
duddy |
8 years ago |
Rockets of the world
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No, we're not referring to the candy. Humanity has done great! Here's a more intricate version of the poster above. It was created by professor Peter Alway and was published in the book Rockets of the World: ...
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13754 |
duddy |
9 years ago |
Let's go to Planet George
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"George" was named by it's discoverer in honour of George III. It wasn't popular and Uranus, the father of Saturn in Roman mythology, was eventually settled upon.
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12549 |
duddy |
9 years ago |
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10982 |
duddy |
9 years ago |
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6563 |
duddy |
9 years ago |
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6541 |
duddy |
9 years ago |
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5911 |
duddy |
8 years ago |
Fully charged in less than 30 seconds
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Israel-based company, StoreDot, has developed a battery made from a new material called nanodots that can charge a smartphone in just 30 seconds, and could be scaled up to charge an electric car within minutes. These special ‘nanodots’, which are artificial peptide molecules - about 2.1 nanometers in diameter - are released into the battery to rapidly increase its absorption and retention of power - almost like a sponge. ...
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5315 |
duddy |
9 years ago |
Medical science at its best
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This is what an eye looks like after keratoprosthesis: a surgical procedure where a diseased cornea is replaced with an artificial cornea.
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4592 |
duddy |
8 years ago |
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3814 |
duddy |
10 years ago |
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3370 |
duddy |
10 years ago |