![]() ![]() The pound has historically been the means of describing the weight of shot or shells in weaponry, and the weapons themselves came to be named after the ammunition they would fire, for example a 32-pounder. Despite broad acceptance of the metric system of weights and measures, the pound continues to be used in English-speaking countries. ![]() Scientific applications use the pound to describe mass, whilst everyday use sees it as a measure of weight. Shakespeare's character Shylock famously asked for "a pound of flesh" as assured security for a loan.Anglers will often express the size of a fish caught in terms of pounds and ounces.In the UK and Ireland, foodstuffs commonly sold by the pound prior to the adoption of the metric system are still sold in quantities equivalent to the old imperial standard, such as butter, which is most usually sold in 454 g (1lb) packets.In English-speaking countries a person's weight is commonly expressed in stones and pounds, although in the United States this is usually expressed purely in pounds.The United States and countries of the Commonwealth of Nations agreed common definitions for the pound (and the yard) that were adopted in 1959 (UK 1964). The UK Weights and Measures Act of 1878 first defined the imperial pound in terms of metric units (1lb = 453.59265g), and in 1893 the Mendenhall Order defined the United States pound by describing a kilogram as equivalent to 2.20462 pounds. 373g), most often as a mass measurement for precious metals. One variation still used today is the Troy pound (approx. In the UK numerous different systems using the pound have co-existed, although the avoirdupois pound (also known as the wool pound) has been the most commonly used and long-lasting (abbreviated to lb av or lb avdp). Although the exact mass defined as a pound has varied from system to system, they have been broadly similar, usually between 350 and 560 metric grammes. Throughout history the pound (or its local translation) has been used as a measurement of weight in many different parts of the world, including The United Kingdom, France, Germany, Scandinavia and Russia. The name pound is an adaptation of the Latin phrase libra pondo, or a pound weight, the Roman libra (hence the symbol lb) weighed approximately 329 grammes. The imperial (avoirdupois, or international) pound is officially defined as 453.59237 grams. The pound is a measurement of mass used in the imperial system, and is accepted on a day-to-day basis as a unit of weight (the gravitational force acting on any given object). U.K., U.S.A, Australia, Canada, New Zealand et al.measurement systems, where the metre, the kilogram and the second are used in relation to one another in order to define other concepts, such as the newton for force and the pascal as a measurement of pressure. It is also the bass unit of mass for all m.k.s. The kilogram is used globally on a day-to-day basis as a unit of measurement for mass and weight. A typical basketball weighs approximately 1kg.Sugar is commonly sold in 1kg measures.A kilogram is the approximate weight of a one litre bottle of soft drink.The International (SI) System of Units published in 1960 used the kilogramme as the base unit of mass, and has been adopted by almost every country on earth (with a few notable the exceptions such as the United States). ![]() The kilogramme (derived from the Greek chilioi and gramma was named as a more practical measure of mass for larger quantities in trade, and came to be used as the base unit of mass in all metric measurement systems. In 1795 metric measurement systems were introduced in France and the gram was defined as "the absolute weight of a volume of pure water equal to a cube of one hundredth of a metre, and at the temperature of the melting ice". It is the only SI unit that is defined by a physical object rather than a fundamental physical property that can be reproduced in laboratories.įor a short period the grave (also a metallic reference standard) was used to define one thousand grams, until it was replaced by the kilogram in 1799. The kg is defined as being equal to the mass of the International Prototype of the Kilogram (IPK), a block of platinum-iridium alloy manufactured in 1889 and stored at the International Bureau of Weights and Measures in Sèvres, France. The kilogram is almost exactly equal to the mass of one litre of water. The kilogram is the base unit of mass in the International (SI) System of Units, and is accepted on a day-to-day basis as a unit of weight (the gravitational force acting on any given object). ![]()
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