Cryogenics scale, both of which measure from absolute zero, rather than more usual scales such as Celsius or Fahrenheit, with their zeroes at arbitrary temperatures. The word "cryogenics" stems from Greek "κρύο (cryo)" – "cold" + "γονική (genic)" – "having to do with production". Cryogenic fluids with their boiling point in Kelvin Liquefied gases, such as liquid nitrogen and liquid helium, are used in many cryogenic applications. Liquid nitrogen is the most commonly used element in cryogenics and is legally purchasable around the world. Liquid helium is also commonly used and allows for the lowest attainable temperatures to be reached. These
Only Words (book) anti-trust laws, and sexual harassment speech are all "only words," but they are not constitutionally protected. Likewise, a "White Only" sign is "only words," but it not treated merely as offensive speech but as an act of segregation and discrimination. Pornography, MacKinnon contends, enacts discrimination in exactly the same way. MacKinnon insists that pornography is not what it says, but what it does: "What pornography does, it does in the real world, not only in the mind." She elaborates: MacKinnon proceeds to argue that abuse and coercion need not be present in the production of all pornography in order to