By Llisa | Published: October 4, 2011
Avogadro’s Number is 6.0221415 X 1023 which is also quantified as N A. “Avogadro’s number, N A , is the fundamental physical constant that links the macroscopic physical world of objects that we can see and feel with the submicroscopic, invisible world of atoms. In theory, N A specifies the exact number of atoms in [...]

Posted in Uncategorized | Also tagged 6, American Scientist, amu, atom, atomic weight, Avogadro's number, billion, carbon, carbon dioxide, Countdown to 10/10/11, dozen, iron, magnesium, marbles, mass, microgram, miles, proton, sulfur, ThinkQuest
By Llisa | Published: October 3, 2011
The International System of Units (SI) is founded on seven SI base units for seven base quantities assumed to be mutually independent, as given in Table 1. Here is the SI list from the NIST reference on Constants, Units and Uncertainty. Table 1. SI base units SI base unit Base quantity Name Symbol length meter [...]

Posted in Uncategorized | Also tagged 7, acceleration, amount of substance, amount-of-substance concentration, ampere, area, base, candela, Countdown to 10/10/11, derived quantity, electric current, kelvin, kilogram, length, luminance, luminous intensity, magnetic field strength, mass, mass density, mass fraction, meter, second, SI, speed, thermodynamic temperature, time, units, velocity, volume, wave number
By Llisa | Published: September 26, 2011
Faraday constant = 6.022141991747723 X 10+23 e mol-1 = 9.65 x 10+4 coulombs per mole. Here is an excerpt from Matt William’s article on the Faraday constant in Universe Today… “When it comes to science, a system of measurements is an absolute necessity, at least where one wants to proceed from theory to practice. This [...]