A furlong is an old british unit of length equal to 0.125 mi, derived from the length of a furrow in an acre of ploughed land. a fortnight is a unit of time corresponding to two weeks, or 14 days and nights. find the speed of light in mega furlongs per fortnight. (one mega furlongs equals a million furlongs.)

Question

Bradford

Physics

29 August, 22:29

A furlong is an old british unit of length equal to 0.125 mi, derived from the length of a furrow in an acre of ploughed land. a fortnight is a unit of time corresponding to two weeks, or 14 days and nights. find the speed of light in mega furlongs per fortnight. (one mega furlongs equals a million furlongs.)

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Dickson · Answer 1

The speed of light is: c = 3x10^8 m/s

or

c = 186,000,000 miles/sec = 1.86x10^8 mi/s

1 furlong = 0.125 mile

1 fortnight = 2 weeks (7d/wk) (24h/d) (3600s/h)

= 1209600s = 1.2096x10^6 s

Therefore,

c = 1.86x10^8 mi/s (1furl/0.125mi) (1.2096x10^6s/fort)

c = 18x10^14 furlong/fortnight = 18x10^8 Mfurlong/fortnight