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What determined the width of standard gauge railroads?

March 9, 2017 | Author: | Posted in Trains

The standard gauge railroad is four feet eight and one half inches wide, measured from the inside of one rail to the inside of the other. This width was determined largely by chance. When tramways were first built in the English coal districts their width was made to conform to the gauge of the common …

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Which is cooler, black or white clothing?

December 13, 2016 | Author: | Posted in Clothing, Outdoors, Science

Many people believe that light-colored clothing is cooler than dark-colored clothing irrespective of the time it is worn. Such is not the case. Assuming the material to be the same in other respects, there is probably little if any difference in warmth between black and white clothing under ordinary circumstances. Only in bright sunshine are …

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