Dudley Dennington, Author at 51¶¯Âþ Science news and science articles from 51¶¯Âþ Sat, 20 Jan 1996 00:00:00 +0000 en-US hourly 1 https://wordpress.org/?v=7.0.2 242057827 A matter of degree /article/1839218-a-matter-of-degree/?utm_campaign=RSS|NSNS&utm_content=currents&utm_medium=RSS&utm_source=NSNS Sat, 20 Jan 1996 00:00:00 +0000 http://mg14920136.200 ENIGMA 858

Within the Earth’s atmospheric range, it is not possible to convert any whole number of degrees Fahrenheit into Celsius by reversing the digits. There is a good approximation in the case of 82 °F, which is nearly 28 °C the same may be said for 61 °F and 16 °C, but in neither case is the conversion exact.

It is possible to construct another scale to Celsius, sharing zero as freezing point, but with a different boiling point, which is a whole number berween Celsius’s 100° and Fahrenheit’s 212°, so that there is a positive point on the Fahrenheit scale which may be converted exactly into the equivalent temperature on the alternative scale simply by reversing the two digits.

What is boiling point on the alternative scale, and what is the convertible Fahrenheit temperature?

A £10 book token will be awarded to the sender of the first correct answer opened on Thursday 22 February. The Editor’s decision is final. Please send entries to Enigma 858, 51¶¯Âþ, King’s Reach Tower, Stamford Street, London SE99 0BB. The winner of Enigma 851 was Sally Ward of Aberdeen.

Answer to Enigma 851: 56 & 67.

]]> 1839218 Enigma: Four graduates No. 840 /article/1837503-enigma-four-graduates-no-840/?utm_campaign=RSS|NSNS&utm_content=currents&utm_medium=RSS&utm_source=NSNS Fri, 15 Sep 1995 23:00:00 +0000 http://mg14719955.500 WHEN four engineering graduates left university they hoped to keep in touch by joining the same firm of international contractors. As luck would have it they could not have been more wrong; they were posted to different parts of the world equidistant from one another.

If the radius of the Earth is 3956 miles, how far apart were they from each other as the crow flies?

A £10 book token will be awarded to the sender of the first correct answer opened on Thursday 19 October. The Editor’s decision is final. Please send entries to Enigma 840, 51¶¯Âþ, King’s Reach Tower, Stamford Street, London SE99 0BB. The winner of Enigma 834 was David Porter of Stockton-on-Tees, Cleveland.

Answer to Enigma 834

Square root of seven

ROOTS 96641

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