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Clue Unit
% Correct
A unit of length, equal to 12 inches. foot

90.1% A unit of time, equal to 2 weeks. fortnight

84.5% A unit of temperature. Fahrenheit

83.1% A unit of length, equal to 660 feet or ^{1} /_{8} of a mile; often used in horse racing. furlong

69% A unit of length, used today almost exclusively at sea to measure water depth etc. fathom

62% The SI unit of electrical capacitance. farad

59.9% The unit of work or energy in the CGS system, equivalent to the work done by a force of one dyne acting through a distance of one centimeter. erg

47.2% A unit of energy or mass in particle physics, defined as the work required to move an electron through a potential difference of one volt. electronvolt

45.8% An old unit of length, defined as the length of the middle finger, from the tip to the joint where the finger is attached to the hand. finger

45.8%

Clue Unit
% Correct
A measure of the 'speed' of a camera lens; more accurately a measure of the light-gathering power of a lens. f ratio

37.3% A unit of liquid volume, equal to ^{1} /_{16} of a pint (US), or ^{1} /_{20} of a pint (UK). fluid ounce

33.1% A measure of computing power, equal to one floating point operation per second. flops

28.9% An alternative name for the femtometre (10^{-15} m), used in atomic physics fermi

26.8% A typographical unit, equal to the currently specified point size e.g. for a 16-point typeface, one of this unit is 16 points. em

25.5% An old unit of length used primarily for the measure of cloth, equal to 45 inches. ell

24.6% A unit of volume equal to ^{1} /_{4} of a barrel. firkin

21.1% A unit of time used in astronomy, whereby times are expressed as years and fractions of years. epoch

16.2% A traditional unit of volume generally equal to the US gallon, or 3.785 litres. flagon

15.5%

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