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In France, there is an ongoing social, political, and legal debate concerning the wearing of the hijab and other forms of Islamic coverings in public. The cultural framework of the controversy can be traced to France's history of colonization in North Africa, [1] but escalated into a significant public debate in 1989 when three girls were suspended from school for refusing to remove their ...
Ray County is a county located in the northwestern portion of the U.S. state of Missouri and is part ... 28.30% from 25 to 44, 23.90% from 45 to 64, and 12.80% who ...
Born to American parents in Aberdeen, Scotland, [3] [4] Crenshaw grew up in Katy, Texas. [5] His mother died of cancer when he was ten years old. [6] [7] His father, Jim Crenshaw, is a petroleum engineer who worked abroad, and Crenshaw spent time growing up in Ecuador and Colombia, developing proficiency in Spanish. [8]
When an X-ray photon collides with an atom, the atom may absorb the energy of the photon and boost an electron to a higher orbital level or if the photon is extremely energetic, it may knock an electron from the atom altogether, causing the atom to ionize.
Gamma-ray sensors are also used for measuring the fluid levels in water and oil industries. [17] Typically, these use Co-60 or Cs-137 isotopes as the radiation source. In the US, gamma ray detectors are beginning to be used as part of the Container Security Initiative (CSI). These machines are advertised to be able to scan 30 containers per hour.
In 1947, the cathode-ray tube amusement device, the earliest known interactive electronic game as well as the first to incorporate a cathode-ray tube screen, was created. [ 34 ] From 1949 to the early 1960s, there was a shift from circular CRTs to rectangular CRTs, although the first rectangular CRTs were made in 1938 by Telefunken.