Weights and measures [R]

Weights and measures [R]

Radian (rad): Supplementary SI unit The radian is the plane angle between two radii of a circle that cuts an arc of length equal to the radius on the circumference.

Real: Old Spanish agrarian measure = 12 bushels. It was also used in Madrid as a plumbing measure, the diameter of a pipe was = one real of fleece for 149 square feet per day (see water pen).

Shower: Spanish plumbing measure (see water pen).

Ream: Measurement for paper = to the bundle of 20 hands = 100 booklets = 500 sheets.

RPM: Measured for frequency and angular velocity = 0.10471975511966 radians per second (rad/s).

Stolen: Spanish surface measure. In Navarre = 8.984560 BC.

Theft: Spanish measure of capacity. In Navarra = 28.12 litres.

Rosa: Cuban measure of surface = 10,000 varas²

Rotolo: Spanish measure for oil. In the Balearic Islands = 0.4506 liters = the so-called oil pound.

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