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
What Do You Mean? Bieber uses a smooth, soulful vocal. Lyrically, "What Do You Mean?" describes not being able to figure out the opposite sex. It was featured in several year-end lists of best songs of 2015. Commercially, the song topped the charts in several countries, including Canada, Ireland, New Zealand, and Norway. In Australia, the United States and the United Kingdom, "What Do You Mean?" was Bieber's first number-one single. The song's music video features Bieber in bed with a young woman and getting kidnapped by masked men, as well as an appearance from actor John Leguizamo. After releasing "Where Are Ü Now"