a mass spectrograph is used to measure the masses of ions, or to separate ions of different masses. in one design for such an instrument, ions with mass m and charge q are accelerated through a potential difference v. they then enter a uniform magnetic field that is perpendicular to their velocity, and are deflected in a semicircular path of radius r. a detector measures where the ions complete the semicircle and from this it is easy to calculate r.
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SAT, 23.06.2019 22:30, dianelys3083p5spb5
Assessment includes a. interviews, recorded conversations, videos, frequency counts, and time samples. b. formal standardized tests and developmental screening tools. c. various types of documented observations, documentation of child work, checklists, rating scales, and standardized tests. d. anecdotal notes, narratives or daily records, daily health checks, and teacher observation checklists.
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SAT, 26.06.2019 05:30, monsterwins5001
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a mass spectrograph is used to measure the masses of ions, or to separate ions of different masses....
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