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2556 |
duddy |
10 years ago |
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21130 |
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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4587 |
duddy |
8 years ago |
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3369 |
duddy |
10 years ago |
World's first x-ray image of a human body part
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Wilhelm Conrad Röentgen, a physics professor at the University of Wurburg in Germany, was experimenting with electric current flow in a partially evacuated glass tube in 1895 and one night he noticed a glow caused by an unknown radiation. He named the phenomenon x-radiation and few months later he took the first x-ray photograph of a body part: the bones in his wife’s hand – and one can even see her wedding band. The first even x-ray image was of a key.
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1 |
1934 |
duddy |
10 years ago |
Beer companies are trying to get scientists drunk
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| After winning the Nobel Prize in Physics in 1922, Carlsberg gave Niels Bohr a perpetual supply of beer. The brewing company had a pipeline running from the brewery to Bohr’s house, so that he could have fresh beer on tap all the time. |
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2242 |
duddy |
10 years ago |
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6537 |
duddy |
9 years ago |
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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90354 |
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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25552 |
duddy |
8 years ago |
Marathon Problems
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You've all experienced the 30-minute test problem. How to tackle it?With all due respect to essay questions, math, science and engineering students can't tip-toe their way around answers. Test questions are most often multiple choice or free response… and don't let the "free" fool you – there is only one correct answer. Besides "That test sucked," the most common complaint I've heard exiting the myriad math-based tests I've taken over the years is, "You know that long problem at the end? I didn't even know where to start. SO unfair." I think what's really unfair is that person's right to use the same language as the rest of us… but I digress. Truth be told, it's safe to say we've all had our trying times with lengthy, intricate word problems w ...
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992 |
bio_man |
7 years ago |
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3814 |
duddy |
10 years ago |
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6560 |
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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12544 |
duddy |
9 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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5312 |
duddy |
9 years ago |
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10979 |
duddy |
9 years ago |