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1) Subdivide the coins in to 2 groups of 4 coins and a third group with the remaining 5 coins. 2) Test 1, Test the 2 groups of 4 coins against each other: a. If the coins balance, the odd coin is in the population of 5 and proceed to test 2a. b. The odd coin is among the population of 8 coins, proceed in the same way as in the 12 coins problem.
In the Middle Ages, an English penny's weight was literally, as well as monetarily, 1 ⁄ 20 of an ounce and 1 ⁄ 240 of a pound of sterling silver. At that time, the pound unit in use in England was the Tower pound, equal to 7,680 Tower grains (also known as wheat grains). The medieval English pennyweight was thus equal to 32 Tower grains.
Coin weights are weights used to weigh precious-metal coins in order to assure they were not underweight (It is easy to shave a bit of metal off the edge of a silver or gold coin). [ 1 ] The usage of coin weights, especially glass ones, goes back to Ptolemaic and Byzantine times. [ 1 ]
A coin base weight (Münzgrundgewicht) is a mathematical reference for the minting of coins that was used in the monetary systems of the Holy Roman Empire. In conjunction with the coin standard ( Münzfuß ), the coin base weight indicates how many coins are to be minted from a specified standard weight.
Button, coin, or watch cells. A button cell, watch battery, or coin battery is a small battery made of a single electrochemical cell and shaped as a squat cylinder typically 5 to 25 mm (0.197 to 0.984 in) in diameter and 1 to 6 mm (0.039 to 0.236 in) high – resembling a button.
The 1 ⁄ 10, 1 ⁄ 4, and 1 ⁄ 2 troy oz coins are identical in design to the 1 troy oz coin except for the markings on the reverse side that indicate the weight and face value of the coin (for example, 1 OZ. fine gold~50 dollars). The print on the smaller coins is, therefore, finer and less legible than on larger denominations.
The German historian Friedrich Hultsch calculated a range of 36.15 to 37.2 kg based on such estimates as the weight of one full Aeginetan metretes of coins, and concluded that the Aeginetan talent represented the water weight of a Babylonian ephah: 36.29 kg by his reckoning (the metretes and the ephah were units of volume). [29]
It fixed the weight of the guldengroschen weight at 29.232 g (or 1/8th a Cologne Mark, or 233.856 g), its fineness at 0.9375, and proposed it be divided into 21 groschen or 60 kreuzer. [ 8 ] 1534: Saxony and Bohemia alter the fineness of their guldiners (or 1-guilder coin) down from .9375 purity to .903 while maintaining the same coin weight ...