Shielding gases fall into two categories--inert or semi-inert. Only two of the noble gases, helium and argon, are cost effective enough to be used in welding. These inert gases are used in gas tungsten arc welding, and also in gas metal arc welding for the welding of non-ferrous metals. Pure argon and helium are used only for some nonferrous metals. Semi-inert shielding gases, or active shield gases, include carbon dioxide, oxygen, nitrogen, and hydrogen. Most of these gases, in large quantities, would damage the weld, but when used in small, controlled quantities, can improve weld characteristics.

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can you use nitrogen as a shielding gas for welding?

A: yes

Since the founding of the republic, there has been a tension between the practice of judicial review and the democratic ideals of egalitarianism, self-government, self-determination and freedom of conscience. At one pole are those who view the Federal Judiciary and especially the Supreme Court as being ''the most separated and least checked of all branches of government.'' Indeed, federal judges and justices on the Supreme Court are not required to stand for election by virtue of their tenure ''during good behavior,'' and their pay may ''not be diminished'' while they hold their position (Section 1 of Article Three). Though subject to the process of impeachment, only one Justice has ever been impeached and no Supreme Court Justice has been removed from office. At the other pole are those who view the judiciary as the least dangerous branch, with little ability to resist the exhortations of the other branches of government. The Supreme Court, it is noted, cannot directly enforce its rulings; instead, it relies on respect for the Constitution and for the law for adherence to its judgments. One notable instance of nonacquiescence came in 1832, when the state of Georgia ignored the Supreme Court's decision in Worcester v. Georgia. President Andrew Jackson, who sided with the Georgia courts, is supposed to have remarked, ''John Marshall has made his decision; now let him enforce it!''; however, this alleged quotation has been disputed. Some state governments in the South also resisted the desegregation of public schools after the 1954 judgment Brown v. Board of Education. More recently, many feared that President Nixon would refuse to comply with the Court's order in United States v. Nixon (1974) to surrender the Watergate tapes. Nixon, however, ultimately complied with the Supreme Court's ruling.

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can someone be kicked out of the supreme court?

A: yes

A rook piercing is a perforation of the antihelix of the ear for the purpose of wearing jewelry. It is located just above the tragus on the ridge between the inner and outer conch with the piercing passing from the underside to the top of this ridge, differing from many ear piercings that essentially span between a ''front'' and ''back'' surface. Erik Dakota, a well known professional piercer and the individual responsible for originating and popularizing the rook piercing, is said to have named this modification after a shortened version of his first name. The piercing was first named in issue #4 of the magazine Body Play and Modern Primitives Quarterly (published by Fakir Musafar) around 1992 alongside the first printed reference to the industrial piercing, then termed ''industrial ear project''.

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does a rook piercing go through the back of your ear?

A: no

Big Time Rush (also known as BTR) was an American pop music boy band formed in 2009. The group consisted of Kendall Schmidt, James Maslow, Logan Henderson, and Carlos Pena Jr. The group starred in Nickelodeon's television series Big Time Rush and signed to a record deal with Nick Records simultaneously with the television series, and then the group was eventually signed to Columbia Records. The show ran from November 28, 2009 to July 25, 2013. The pilot episode featured the group's first promotional single, ''Big Time Rush''. They have released three studio albums which all achieved success. The band stopped performing in 2014.

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is the big time rush band still together?

A:
no