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[1] The long or imperial hundredweight of 8 stone or 112 pounds (50.80 kg) is defined in the British imperial system. [2] Under both conventions, there are 20 hundredweight in a ton, producing a "short ton" of 2,000 pounds (907.2 kg) and a "long ton" of 2,240 pounds (1,016 kg).
The Spanish pound (Spanish: libra) was 460 g. [12] The Spanish ounce (Spanish onza) was 1 ⁄ 16 of a pound, i.e. 28.75 g. [13] It was further subdivided into 16 adarmes (each 1.8 grams). For pharmaceutical use, the Greek dracma was used, subdividing the Spanish ounce into 8 (3.6 grams), due to being equivalent to 1 ⁄ 12 of an
Thickness of leather is measured in ounces, 1 oz equals 1 ⁄ 64 inch (0.40 mm). [30] Bolts and screws follow the Unified Thread Standard rather than the ISO metric screw thread standard. Knitting needles in the United States are measured according to a non-linear unitless numerical system.
The density of precious metals could conceivably be based on Troy ounces and pounds, a possible cause of confusion. Knowing the volume of the unit cell of a crystalline material and its formula weight (in daltons), the density can be calculated. One dalton per cubic ångström is equal to a density of 1.660 539 066 60 g/cm 3.
Water bottles for personal use can have their capacity measured in fluid ounces or liters. For ounces, the measurements are typically in multiples of 8, for example 32 fl oz and 40 fl oz, which correspond closely to common metric variants including 1 liter and 1.2 liters. Rainfall is usually measured based on the height from the ground in ...
The centigrade heat unit (CHU) is the amount of heat required to raise the temperature of one pound (0.45 kg) of water by one Celsius degree. It is equal to 1.8 Btu or 1,899 joules. [26] In 1974, this unit was "still sometimes used" in the United Kingdom as an alternative to Btu. [27] Another legacy unit for energy in the metric system is the ...
A typical turbocharged V8 diesel engine might have an engine power of 250 kW (340 hp) and a mass of 380 kg (840 lb), [1] giving it a power-to-weight ratio of 0.65 kW/kg (0.40 hp/lb). Examples of high power-to-weight ratios can often be found in turbines. This is because of their ability to operate at very high speeds.
The atomic mass constant, denoted m u, is defined identically, giving m u = 1 / 12 m(12 C) = 1 Da. [ 4 ] This unit is commonly used in physics and chemistry to express the mass of atomic-scale objects, such as atoms , molecules , and elementary particles , both for discrete instances and multiple types of ensemble averages.