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What were the eastern, western and northern boundaries of Egyptian settlement?
asked
Dec 5, 2016
Social Studies
middle-school
1
answer
4
votes
195k
views
The excitation of an electron on the surface of a photocell required 5.0 x 10 –27 J of energy. Calculate the wavelength of light that was needed to excite the electron in an atom on the photocell
asked
Dec 22, 2015
Physics
high-school
1
answer
2
votes
107k
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