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Issue:

Science

 

Written by:

Elizabeth B

 

Date added:

July 15, 2014

 

Level:

University

 

Grade:

B

 

No of pages / words:

2 / 291

 

Was viewed:

2050 times

 

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Essay content:

In 1909, RA Millikan, an American scientist, measured that charge. All electrons are found to be identical no matter their source or the method of liberating them from matter. From the values of e/m, and e, the mass of an electron was calculated to be .00055 amu. PROTON- Eugeen Goldstein used a Crookes tube with holes in the cathode, and observed that another kind of ray was emitted from the anode and passed through the holes...
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He discovered this in 1886. In 1889, William Wien showed these rays to be positively charged. The ratio of charge to mass was smaller than electrons, but varied in different gasses. This meant that either charge varied, mass varied or both varied. Both vary. Charge is equal to an electron, but opposite in sign...
displayed 300 characters

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