A block is hanged by means of two identical wires having cross-section area A (1"mm"^2) as shown in the figure. If temperature is lowered by Delta T (10^(@) C), find the mass ("in kg") to be added to hanging mass such that junction remains at its initial positions. Given that coefficient of linear expansion alpha=2 xx 10^(-5) I^(0) C and Young's modulus Y= 5 xx 10^(11) N//m^(2) for the wire.

A block is hanged by means of two identical wires having cross-section

1.	A block is hanged by means of two identical wires having cross-section area A (1"mm"^2) as shown in the figure. If temperature is lowered by Delta T (10^(@) C), find the mass ("in kg") to be added to hanging mass such that junction remains at its initial positions. Given that coefficient of linear expansion alpha=2 xx 10^(-5) I^(0) C and Young's modulus Y= 5 xx 10^(11) N//m^(2) for the wire.
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