Two rods of equal length (0.45 cm) and diameter (1.5 cm) are placed end to end. One rod is aluminum, the

Two rods of equal length (0.45 cm) and diameter (1.5 cm) are placed

end to end. One rod is aluminum, the other is brass. If a compressive
force of 8400 N is applied to the rods, how much does their combined
length decrease? Label your answer ‘mm’.


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