Gas laws 1662 Robert Boyle studied the relationship between volume and pressure of a gas of fixed amount at constant temperature. He observed that volume of a given mass of a gas is inversely proportional to its pressure at a constant temperature. Boyle's law, published in 1662, states that, at constant temperature, the product of the pressure and volume of a given mass of an ideal gas in a closed system is always constant. It can be verified experimentally using a pressure gauge and a variable volume container. It can also be derived from the kinetic theory of gases: if a container,
Who is a Jew? as an uncodified constitution); however, the definition of "who is a Jew" has become an important issue in Israeli politics due to the involvement of religious parties in the Knesset. The issue of who is considered a Jew has given rise to legal controversy in Israel. There have been court cases in Israel since 1962 that have addressed the question. , anyone who immigrated to Israel after 1990 and wishes to marry or divorce via the Jewish tradition within the state limits must go through a "Judaism test" at an Orthodox Rabbinical court. In this test, a person would need