Cryogenics necessary to use a silicon diode for accuracy. Cryogenics In physics, cryogenics is the production and behaviour of materials at very low temperatures. A person who studies elements that have been subjected to extremely cold temperatures is called a "cryogenicist". It is not well-defined at what point on the temperature scale refrigeration ends and cryogenics begins, but scientists assume a gas to be cryogenic if it can be liquefied at or below . The U.S. National Institute of Standards and Technology has chosen to consider the field of cryogenics as that involving temperatures below . This is a logical dividing
What Do You Mean? You Mean" debuted atop the ARIA Singles Chart on September 5, becoming Bieber's first number-one single on the chart. The song spent four consecutive weeks on top of the chart, becoming the second-longest running chart-topping track for 2015 and gaining a platinum certification from the Australian Recording Industry Association. On October 3, Bieber was knocked off the top by Macklemore & Ryan Lewis's "Downtown". "What Do You Mean" also debuted at the top of the charts in both New Zealand and Ireland, becoming his first number-one single in both countries. It spent seven consecutive weeks at number one in Ireland,