Atomic clocks keep time by means of quartz crystals and periodic radio-controlled synchronization with the NIST atomic clock. Visitors to this website will find comparisons of radio-controlled clocks and watches.
A wall clock can serve as a stylish wall decoration in addition to telling time. Modern wall clocks use quartz movements run by battery power, while traditional wall clocks may rely on weights and pendulums.
Pure quartz glass is highly transparent and resistant to thermal, physical, and chemical impacts. These are optimum prerequisites for use in optics, data technology or medical engineering. ...
Science Daily. Thu, 17 May 2018 10:23:50 EDT.
During his confirmation hearing for secretary of state, CIA Director Mike Pompeo confirmed he has spoken with Special Counsel Robert Mueller. Quartz White House correspondent Heather Timmons joins CBSN to explain the latest developments.
CBS News. Thu, 12 Apr 2018 20:05:16 +0000.