Q3 a) How the hardness of a mild steel specimen is determined using a Brinellhardness testing machine?b) A silicon wafer is doped with 3.00 x 107 boron atoms/ m? at 27°C. Theelectron and hole mobilities of charge carriers are 0.35 m? / V's' and0.68 m? / V's'respectively. Calculate the electrical resistivity of the material?

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

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Thermal Properties of Materials

In mechanical engineering, the thermal property is represented as the physical quantity that is relevant to the application of heat. The thermal properties are evaluated by variations in any specific material due to low heat or high heat. The quantities that influence the thermal property of the materials are mass, density, temperature, and many others.

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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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