3. Given a bronze wire of length 2.5 m and cross sectional area 6.5 x 10^-7 m2. What is the elongation of the wire if it is stretched under a force of 10^3 N? Given: Young modulus
of bronze is 2.0 x 10^11 N/m2.

Two kilograms of air within a piston–cylinder assembly executes a carnot power cycle with maximum and minimum temperatures of 800 k and 300 k, respectively. the heat transfer to the air during the isothermal expansion is 60 kj. at the end of the isothermal expansion the volume is 0.4 m3. assume the ideal gas model for the air. determine the thermal efficiency, the volume at the beginning of the isothermal expansion, in m3, and the work during the adiabatic expansion, in kj.