Assuming that an ion of tin-120 is at rest before being accelerated, show that the final speed after acceleration is 177km/s
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The diagram shows a mass spectrometer used for measuring the masses of isotopes. It consists of an ion generator and accelerator, a velocity selector and an ion separator, all in a vacuum.
In one experiment, tin ions, each of which carries a charge +1.6 × 10-19C, are produced in the ion generator and are then accelerated by a p.d. of 20kV. Tin has a number of isotopes, two of which are tin-118 (118Sn) and tin-120 (120Sn).
- Assuming that an ion of tin-120 is at rest before being accelerated, show that the final speed after acceleration is 177km/s.
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