X Volume

A motor fuel has an octane number X if it behaves under tightly defined experimental conditions the same as a mixture of X volume % of isooctane and (100 - X)% of n-heptane. The isooctane-heptane binary mixtures are called primary reference fuels. Octane numbers higher than 100 can also be defined the reference material is isooctane with small quantities of tetraethyl lead added the way in which this additive acts will be discussed later. 

The ultimate definition of thermodynamic temperature is in terms of pV (pressure X volume) in a gas thermometer extrapolated to low pressure. The kelvin (K), the unit of thermodynamic temperature, is defined by specifying the temperature of one fixed point on the scale—the triple point... 

Mean free path Mole fraction X X Volume V... 

The specific conductance (k) of a solution is defined as the conductance (S) per centimetre of a solution that has a cross-sectional area of 1 cm2, and is measured in S cm-1 (or in non-SI units as fl-1 cm-1). The molar conductance (A) is the specific conductance of a solution corrected for the concentration of ions in the solution. A = k X volume of solution which contains 1 gram mole. 

More physiologically, it can be shown that work is given by pressure x volume. This enables indices such as work of breathing to be calculated simply by studying the pressure-volume curve. 

Proton mobility (D J and water self-diffusion coefficient (D q) as a function of the water volume fraction (X ) in Nafion and SPEEKK, where X, = volume of water in membrane divided by volume of wet membrane. (From Kreuer, K. D. 2001. Journal of Membrane Science 185 29-39.)... 

Number of moles = concentration of diluted solution x volume of diluted solution = 0-000040 X 0-050 = 2-0 X lO-o... 

Capacity utilization = time based utilization x asset utilization x volume utilization... 

The time taken for a system to reach a desired pressure within the molecular flow regime cannot be calculated as simply as it can for viscous flow, because the outgassing of the various materials used in the construction of the system starts to play an important role in terms of the quantities of gas which have to be removed. However, since the product of the pressure in the system and the net pumping speed is equal to the total gas load (measured in units of pressure x volume) it is clear that the net pumping speed (Equation (1.4)) should be kept as large as possible. The molecular flow conductance of a long tube is given by... 

Fig. X. Volume element used in making mass balance.

P. Jartoux, April 12,1711, The Description of a Tartarian Plant, call d Gin-seng with an Account of its Virtues. In a letter from Father Jartoux to the Procurator General of the Mission of India and China. X Volume of Letters of the Missionary Jesuits, printed in Paris in Octavo, 1713. 

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