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Where is the Land of the Midnight Sun?

December 15, 2016 | Author: | Posted in Environmental, Science

The sun shining at midnight in the arctic or antarctic summer is known as the midnight sun. Norway is popularly called the “Land of the Midnight Sun” because this phenomenon has been more frequently observed in that region by visitors from western Europe and the United States. The description would be equally applicable to other …

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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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Why wasn’t the year 1900 a leap year?

December 12, 2016 | Author: | Posted in History, Science

According to the Gregorian calendar, which was introduced by Pope Gregory in 1582 A.D. and which was adopted by Great Britain and the English colonies in 1752, every year whose number is divisible by four is a leap year, with the exception of those years whose numbers are divisible by 1oo and not by 400. …

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Why do electric light bulbs pop when broken?

December 10, 2016 | Author: | Posted in Science

If the filament in electric light bulbs were made red hot in air it would oxidize and burn up. Therefore the bulb must consist of a vacuum or it must be filled with a gas in which there is no oxygen. The air is pumped out of ordinary electric light bulbs until a vacuum or …

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