Q3 a) How the hardness of a mild steel specimen is determined using a Brinell hardness testing machine?

College Physics
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ISBN:9781305952300
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Chapter1: Units, Trigonometry. And Vectors
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solve 3 a and b please in the image provided.

Q3 a) How the hardness of a mild steel specimen is determined using a Brinell
hardness testing machine?
b) A silicon wafer is doped with 3.00 x 107 boron atoms/ m? at 27°C. The
electron and hole mobilities of charge carriers are 0.35 m? / V's' and
0.68 m? / V's 'respectively. Calculate the electrical resistivity of the material?
Transcribed Image Text:Q3 a) How the hardness of a mild steel specimen is determined using a Brinell hardness testing machine? b) A silicon wafer is doped with 3.00 x 107 boron atoms/ m? at 27°C. The electron and hole mobilities of charge carriers are 0.35 m? / V's' and 0.68 m? / V's 'respectively. Calculate the electrical resistivity of the material?
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