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The kilogram, symbol kg, is the SI unit of mass. It is defined by taking the fixed numerical value of the Planck constant h to be 6.626 070 15 × 10 −34 when expressed in the unit J⋅s, which is equal to kg⋅m 2 ⋅s −1, where the metre and the second are defined in terms of c and Δν Cs. —
The SI unit of weight is the same as that of force: the newton (N) – a derived unit which can also be expressed in SI base units as kg⋅m/s 2 (kilograms times metres per second squared). [ 21 ] In commercial and everyday use, the term "weight" is usually used to mean mass, and the verb "to weigh" means "to determine the mass of" or "to have ...
When an object's weight (its gravitational force) is expressed in "kilograms", this actually refers to the kilogram-force (kgf or kg-f), also known as the kilopond (kp), which is a non-SI unit of force. All objects on the Earth's surface are subject to a gravitational acceleration of approximately 9.8 m/s 2.
Scouts BSA [8] has adopted the shorter sledgehammer, commonly referred to as an engineer's hammer, [9] as an unofficial tool referred to as the scout hammer, as a complement to the pocket knife and hand axe. The handle is 12–18 inches (30–46 cm) long with a head weighing 2 to 6 lb (0.91–2.72 kg).
As can be seen, when the dimensional units appearing in the numerator and denominator of the equation's right hand side are cancelled out, both sides of the equation have the same dimensional units. Dimensional analysis can be used as a tool to construct equations that relate non-associated physico-chemical properties.
≡ 100 lb av = 45.359 237 kg: hyl; metric slug: ≡ 1 kgf / 1 m/s 2 = 9.806 65 kg: kilogram (kilogramme) kg ≈ mass of the prototype near Paris ≈ mass of 1 litre of water (SI base unit) [8] kip: kip ≡ 1000 lb av = 453.592 37 kg: mark: ≡ 8 oz t = 248.827 8144 g: mite: ≡ 1 ⁄ 20 gr = 3.239 9455 mg: mite (metric) ≡ 1 ⁄ 20 g = 50 mg ...