feet; abbreviation: ft; symbol: â² , the prime symbol) is a unit of length in the imperial and US customary systems of measurement. Since 1959, both units have been defined by international agreement as equivalent to 0.3048 meters exactly. In both systems, the foot comprises 12 inches and three feet compose a yard.
Avogadro's law (sometimes referred to as Avogadro's hypothesis or Avogadro's principle) is an experimental gas law relating volume of a gas to the amount of substance of gas present.[1] A modern statement of Avogadro's law is:
The Ideal Gas Law can easily be reduced to Charlesâ, Boyleâs, or Avogadroâs Law. For example, suppose that n and T are held constant. Then the product nRT is also a constant and we can give it the name, k. The Ideal Gas Law then becomes PV=k, which is just Boyleâs Law. The symbol âRâ in this equation is a constant called âthe gas constantâ and its value can be computed by measuring the temperature, volume, and pressure of a known quantity of an ideal gas and substituting these values into the Ideal Gas Law solved for R. In fact, this is the bases of the laboratory exercise for this lesson.