When was Van de Graff generator invented and by whom? a) 1944, Robin Van de Graff b) 1932, Robert Van de Graff c) 1933, Robin Van de Graff d) 1933, Robert Van de Graff
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When was Van de Graff generator invented and by whom?
a) 1944, Robin Van de Graff
b) 1932, Robert Van de Graff
c) 1933, Robin Van de Graff
d) 1933, Robert Van de Graff
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