J j thomson is best known for his discoveries about the nature of cathode rays another important contribution of his was the invention together with one of his students of the mass spectrometer the ratio of mass m to positive charge q of an ion may be accurately determined in a mass spectrometer. Mastering mastering physics problems step by step solutions pt 1 tactics box 321 right hand rule for fields magnetic field from two wires a wire and a compass direction of the magnetic field due to a wire conceptual question magnetic field at the center of a wire loop mass spectrometer conceptual questions enhanced eoc problem 3227. How a mass spectrometer works if something is moving and you subject it to a sideways force instead of moving in a straight line it will move in a curve deflected out of its original path by the sideways force. How mass spectrometry can be used to probe fingerprints in greater detail than ever before machine sniffs out skin cancer bbc news 21 august 2008 an example of how mass spectrometry has been used in medical research mobile crime scene lab developed bbc news 22 october 2004 how forensic scientists developed a mobile mass spectrometer . A number of satellites and spacecraft have mass spectrometers for the identification of the small numbers of particles intercepted in space for example the soho satellite uses a mass spectrometer to analyze the solar wind mass spectrometers are used for the analysis of residual gases in high vacuum systems
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