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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.
According to this source, 1 November 2011 to 30 September 2012 will be a transitional period and as of 1 October 2012, imports and sales of ordinary incandescent bulbs of 100 watts or more will be prohibited. The first phase will be followed by a ban on 60-watt-and-higher incandescent light bulbs starting in October 2014.
The observation of minutes to hours of X-ray flashes after a short gamma-ray burst is consistent with small particles of a primary object like a neutron star initially swallowed by a black hole in less than two seconds, followed by some hours of lesser energy events, as remaining fragments of tidally disrupted neutron star material (no longer ...
The Big Bang is a physical theory that describes how the universe expanded from an initial state of high density and temperature. [1] The notion of an expanding universe was first scientifically originated by physicist Alexander Friedmann in 1922 with the mathematical derivation of the Friedmann equations.
The original World Trade Center (WTC) was a complex of seven buildings in the Financial District of Lower Manhattan in New York City.Built primarily between 1966 and 1975, it was dedicated on April 4, 1973, and was destroyed during the September 11 attacks in 2001.
On April 6, 1830, Smith founded the Church of Christ. [30] In 1832, Smith added an account of a vision he had sometime in the early 1820s while living in Upstate New York. [31] Some Mormons regarded this vision as the most important event in human history after the birth, ministry, and resurrection of Jesus Christ. [32]