tag:blogger.com,1999:blog-33745513444896760832024-02-19T08:28:38.656-08:00Know This StuffAnonymoushttp://www.blogger.com/profile/09124466653443864995noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-3374551344489676083.post-69166939174040426902015-07-13T10:46:00.000-07:002015-07-13T10:46:15.149-07:00World's Roundest Object: #New_Kilogram<div dir="ltr" style="text-align: left;" trbidi="on">
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiePkgGq_LN74dii8nVzElWgz26hsT-KymWLLUCuUkRBTYlnEqXY8d5p0BDqxfkPcc1CO699JFU7MfnqSymbtU4LeGNFhNRFDNyvhmGRKzKjZayvX-HVxXZ2-XEcGufkrs96t_Qrrvu59U8/s1600/world-roundest-object.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="348" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiePkgGq_LN74dii8nVzElWgz26hsT-KymWLLUCuUkRBTYlnEqXY8d5p0BDqxfkPcc1CO699JFU7MfnqSymbtU4LeGNFhNRFDNyvhmGRKzKjZayvX-HVxXZ2-XEcGufkrs96t_Qrrvu59U8/s640/world-roundest-object.png" width="640" /></a></div>
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<span style="font-family: Verdana, sans-serif; font-size: large;">This sphere made with Silicon is the roundest object on earth and this may provide new definition for the Kilogram, sounds crazy. Those who have finished their secondary education in Science may know that: </span><span style="color: #351c75; font-family: Verdana, sans-serif; font-size: large;"><i>the Kilogram is equal to the mass of Platinum Iridium cylinder kept under some basement in a secret vault in Paris.</i> </span><span style="font-family: Verdana, sans-serif; font-size: large;"> </span><br />
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<span style="font-family: Verdana, sans-serif; font-size: large;">But, what the Kilogram has to do with the Roundest object on earth? Let's see:</span><br />
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<span style="color: red; font-family: Verdana, sans-serif; font-size: x-large;"># </span><span style="font-family: Verdana, sans-serif; font-size: large;">First unit for mass was the Grave (<i>from Latin word gravitas meaning "weight")</i> and was defined as the weight of 0.1 m cube of water at 0 degree Celsius </span></div>
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<span style="color: red; font-family: Verdana, sans-serif; font-size: x-large;"># </span><span style="font-family: Verdana, sans-serif;"><span style="font-size: large;">Then to weigh smaller or lighter things the term "gramme" was coined which was mathematically defined as:</span></span></div>
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<span style="font-family: Verdana, sans-serif;"><span style="font-size: large;"><span style="color: blue;"> 1 Grave = 1000 grammes</span> </span></span></div>
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<span style="color: red; font-family: Verdana, sans-serif; font-size: x-large;"># </span><span style="font-family: Verdana, sans-serif;"><span style="font-size: large;">Also, the "gramme" was too small so a new term for the "Grave" was the "<i>Kilogram</i>"</span></span></div>
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<span style="color: red; font-family: Verdana, sans-serif; font-size: x-large;"># </span><span style="font-family: Verdana, sans-serif;"><span style="font-size: large;">So, this made the Kilogram the only basic S.I. units out of seven having the word "Kilo" as prefix and in 1799 the definition was changed to the mass of water @ 4 degrees Celsius. @ which the water is densest.</span></span></div>
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<span style="color: red; font-family: Verdana, sans-serif; font-size: x-large;"># </span><span style="font-family: Verdana, sans-serif;"><span style="font-size: large;">So, as the time passed people realized that making water the measure of mass is not that precise. A platinum cylinder was made having the same mass of the water definition.</span></span></div>
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<span style="color: red; font-family: Verdana, sans-serif; font-size: x-large;"># </span><span style="font-family: Verdana, sans-serif;"><span style="font-size: large;">Again in 1889 the platinum cylinder was replaced by the Cylinder of Platinum Iridium called as the "<i>Le Grande</i>" </span></span></div>
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<span style="color: red; font-family: Verdana, sans-serif; font-size: x-large;"># </span><span style="font-family: Verdana, sans-serif;"><span style="font-size: large;">The Kilogram is the only basic S.I. unit which is defined by a physical object</span></span></div>
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<span style="color: red; font-family: Verdana, sans-serif; font-size: x-large;"># </span><span style="font-family: Verdana, sans-serif;"><span style="font-size: large;">After all this, still there was a problem with this system. It is that mass of the Platinum Iridium varies widely over time as saw in 1948. </span></span></div>
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<span style="font-family: Verdana, sans-serif;"><span style="color: red; font-size: x-large;"># </span><span style="font-size: large;">Here is where the roundest object comes in play. the cost of the material from which it is made is <i>1 million Euros. </i>It is so expensive because it is made from Silicon and only one isotope of Silicon i.e. Si 28</span></span></div>
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<span style="font-family: Verdana, sans-serif;"><span style="color: red; font-size: x-large;"># </span><span style="font-size: large;">But why sphere? Because sphere is the most simple shape. i.e. if you know it's diameter, one can all it's geometrical things like volume, area etc. </span></span></div>
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<span style="font-family: Verdana, sans-serif;"><span style="color: red; font-size: x-large;"># </span><span style="font-size: large;">How does this Sphere helps in defining the "Kilogram"? </span></span></div>
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<span style="font-family: Verdana, sans-serif;"><span style="font-size: large;">Here it is once we know the diameter we know it's Volume so,</span></span></div>
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<span style="font-family: Verdana, sans-serif;"><span style="color: blue; font-size: large;">Volume = 3.14x (diameter)^3</span></span></div>
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<span style="color: blue; font-family: Verdana, sans-serif; font-size: large;">Therefore: Volume / Density of atoms = No. of atoms.</span><span style="color: blue; font-family: Verdana, sans-serif; font-size: large;"> </span></div>
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<span style="color: blue; font-family: Verdana, sans-serif; font-size: large;"><b>NO. OF ATOMS=2.15 X 10^25</b></span></div>
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<span style="font-family: Verdana, sans-serif;"><span style="color: red; font-size: x-large;"># </span><span style="font-size: large;">So, we have redefined the definition of Avogadro, No. </span></span></div>
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<span style="font-family: Verdana, sans-serif;"><span style="font-size: large;">it is defined as <i>the no. of atoms in 12 gms of Carbon 12.</i></span></span></div>
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<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgfieV0Thvze-vCuYrijZcEjqxyElgFPw0MbSFXvLMDsG_gfGiuyu_r3MmiP2AG2KnlXOT-c2xbt1vNuIECRQT8WisQDunG3Q2RevgI886Js7gfE8U-Gj0bjqHYMLbjnrwzb5IYIrQb5IuN/s1600/FreshPaint-12-2015.07.13-10.53.59.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" height="180" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgfieV0Thvze-vCuYrijZcEjqxyElgFPw0MbSFXvLMDsG_gfGiuyu_r3MmiP2AG2KnlXOT-c2xbt1vNuIECRQT8WisQDunG3Q2RevgI886Js7gfE8U-Gj0bjqHYMLbjnrwzb5IYIrQb5IuN/s320/FreshPaint-12-2015.07.13-10.53.59.png" width="320" /></a></div>
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<span style="font-family: Verdana, sans-serif;"><span style="color: red; font-size: x-large;"># </span><span style="font-size: large;"> Even if the Silicon Sphere is damaged we have the official definition of "Kilogram" as </span></span></div>
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<span style="font-family: Verdana, sans-serif;"><span style="color: #cc0000; font-size: large;"><b><i>"Mass of 2.15 x 10^25 atoms of Silicon 28"</i></b></span></span></div>
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<span style="color: red; font-family: Verdana, sans-serif; font-size: x-large;"># </span><span style="font-family: Verdana, sans-serif; font-size: large;">Now may the Kilogram will be defined by a concept not by a physical object.</span></div>
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<span style="color: red; font-family: Verdana, sans-serif; font-size: x-small;">source: Youtube Channel Vertasium</span></div>
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Anonymoushttp://www.blogger.com/profile/09124466653443864995noreply@blogger.com0Civil Lines Civil Lines30.911432 75.848749