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416 pages, ebook
First published May 8, 2018
Before the imprecision of the natural world, all will falter, none shall survive—no matter how precise.But we will certainly give it our best shot.
[the engine] was taken by truck to the Gloster test airfield near the Cotswold village of Brockworth, a town better known today for its annual midsummer cheese-rolling contest, when drunken locals try to pursue a huge round cheese as it is set thundering down a local hill.I will now always associate jet engines with inebriated English townies chasing giant wheels of cheese over hill and dale. The chapter also includes a wonderfully dry report, by one of the principals, of staff involved in an experiment desperately fleeing for their lives as the engine in question, it is clear, is about to explode. ROFL material, well, for me, anyway.
The tools held on the slide rest can then be moved across the path of travel dictated by the leadscrew, thereby allowing the tools to make holes in the workpiece, or to chamfer it or (in due course, once milling had been invented, a process of related in the next chapter) mill it or otherwise shape it to the degree that the lathe operator demands.Ummmm…huh? Really, there are very few of these.
The test masses on the LIGO devices...are so exact in their making that the light reflected by them can be measured to one ten-thousandth of the diameter of a proton. They can also compute with great precision the distance between this planet and our neighbor star Alpha Centauri A, which lies 4.3 light-years away. The distance in miles of 4.3 light-years is 26 trillion miles, or, in full, 26,000,000,000,000 miles. It is now known with absolute certainty that the cylindrical masses on LIGO can help to measure that vast distance to within the width of a single human hair.