Aluminium is more reactive than Fe. But Al is less easily corroded than iron because A. Al is noble metal B. Fe forms both mono and divalent ions C. Al forms a protective oxide layer D. Fe undergoes reaction easily with H2O

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consider the figure of a single riveted lap joint as follows

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cyclic heat engine operates between. temperature of 30 C. What is the least rate of heat rejection per kW net output of an engine. source temperature of 800 C and sink

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