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Quantities and Units

Quantities and Units. Afit Sutiyawan , S.Pd. Environmental.

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Quantities and Units

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  1. Quantities and Units AfitSutiyawan, S.Pd

  2. Environmental Apabiladisebuahruangtunggupraktekdokterdikotamuadaseorang yang akanmemeriksakananaknyaberceritaberulang-ulangdengannyaringbahwa, Iasemalamtelahmengukursuhubadananaknyamenggunakan barometer, ternyatasuhubadananaknya 40 kg What was the reaction of other people who heard that statement?

  3. Physical Quantities Something that can be measured and the results can be expressed with the value and units called Physical Quantities Principal Quantities Quantities Derivatives Quantities

  4. Principal Quantities Quantities of principal is the amount that had been established and is the basic quantities, quantities of goods consisting of seven quantities:

  5. Dimension Dimension is defined the way it was composed by the mass quantities of goods. Use Dimensions: • To reduce the force of a magnitude • To investigate the truth of a formula or equation

  6. Derivatives Quantities Derivatives Quantities is defined as the quantities are converted or derived from the principal quantities

  7. Standard of Units • Unit of Mass=> a cylinder made of platinum iridium, which is stored in the Bureu of international weights and measures in Sevres • Unit of Length => the distance of light (in vacuum) at intervals 1/299.792.458 seconds. • Unit of Time=> time required cesium-133 atom vibrates 9,192,631,770 times • Unit of Temperature => temperature of the melting point of ice at 76 cmHg is T = 273.15 K, the temperature of the boiling point of water at 76 cmHg is T = 373.15 K

  8. Standard of Units • Unit of electric current => amount of electric charge of one coulomb (1C = 6.25 x 10 18 electrons) that passes through a cross-section in one second • Unit of light intensity => black body width of 1 m 2 a temperature melting point of platinum (1773 0 C) will emit light in a direction perpendicular to a strong and light for 6 x 10 5candela. • Units of amount of substance => one composed of 6.025 mol x 10 23particles

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