Gas dioxide, and air expand to the same extent over the same 80 kelvin interval. He noted that, for an ideal gas at constant pressure, the volume is directly proportional to its temperature: In 1802, Joseph Louis Gay-Lussac published results of similar, though more extensive experiments. Gay-Lussac credited Charles' earlier work by naming the law in his honor. Gay-Lussac himself is credited with the law describing pressure, which he found in 1809. It states that the pressure exerted on a container's sides by an ideal gas is proportional to its temperature. In 1811, Amedeo Avogadro verified that equal volumes of pure
Same-sex marriage and the family biological inequality between opposite-sex and same-sex couples, an inequality that is raised in American legal circles in light of the Equal Protection Clause of the 14th Amendment to the United States Constitution. In 1996, Congress passed the Defense of Marriage Act that defines marriage in Federal law as "a legal union between one man and one woman as husband and wife". Congressional record, a House Report (H.R. 104-664 at 33, 104th Congress, 2nd Session, 1996), states that procreation is key to the requirement of a valid marriage being a union and of one man and one woman. It has been