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R is a programming language for statistical computing and data visualization. It has been adopted in the fields of data mining, bioinformatics, and data analysis. The core R language is augmented by a large number of extension packages, containing reusable R .
Latin R with dot below Ṛ (minuscule: ṛ) is a letter of the Latin alphabet, formed from R with the addition of a dot below the letter. It is used in the transliteration of Afro-Asiatic languages to represent an "emphatic r". It is used in transliterating Indo-Aryan and or a .
- Dimensions
- Relationship with The Boltzmann Constant
- Measurement and Replacement with Defined Value
- Specific Gas Constant
- U.S. Standard Atmosphere
- External Links
From the ideal gas law PV = nRTwe get: 1. R = P V n T {\displaystyle R={\frac {PV}{nT}}} where P is pressure, V is volume, n is number of moles of a given substance, and T is temperature. As pressure is defined as force per area of measurement, the gas equation can also be written as: 1. R = f o r c e a r e a × v o l u m e a m o u n t × t e m p e r...
The Boltzmann constant kB (alternatively k) may be used in place of the molar gas constant by working in pure particle count, N, rather than amount of substance, n, since: 1. R = N A k B , {\displaystyle R=N_{\rm {A}}k_{\rm {B}},\,} where NA is the Avogadro constant.For example, the ideal gas lawin terms of the Boltzmann constant is: 1. P V = N k B...
As of 2006, the most precise measurement of R had been obtained by measuring the speed of sound ca(P, T) in argon at the temperature T of the triple point of water at different pressures P, and extrapolating to the zero-pressure limit ca(0, T). The value of Ris then obtained from the relation: 1. c a ( 0 , T ) = γ 0 R T A r ( A r ) M u , {\displays...
The specific gas constant of a gas or a mixture of gases (Rspecific) is given by the molar gas constant divided by the molar mass (M) of the gas or mixture: 1. R s p e c i f i c = R M {\displaystyle R_{\rm {specific}}={\frac {R}{M}}} Just as the molar gas constant can be related to the Boltzmann constant, so can the specific gas constant by dividin...
The U.S. Standard Atmosphere, 1976 (USSA1976) defines the gas constant R∗as: 1. R∗ = 8.31432×103 N⋅m⋅kmol−1⋅K−1 = 8.31432 J⋅K−1⋅mol−1. Note the use of kilomoles, with the resulting factor of 1000 in the constant. The USSA1976 acknowledges that this value is not consistent with the cited values for the Avogadro constant and the Boltzmann constant. T...
Ideal gas calculator Archived 2012-07-15 at the Wayback Machine– Ideal gas calculator provides the correct information for the moles of gas involved.其他人也問了
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