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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 views

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