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A living plant leaf is an open system that exchanges energy (sunlight and thermal flows) + matter (O2, CO2, water vapor, etc.) with the surroundings (the exterior). Even with irreversible processes (energy dissipation) we find that the net entropy change for the system + surroundings can decrease; i.e. dS < 0. Using equations presented in lecture and your own critical thinking: a) explain how this is possible in terms of deS and diS. b) Explain how the Second Law remains valid for this case.
the state liquid water is changed from 50 pisa and 50 f to 200 pisa and 100 f. determine the change in the internal
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the two 1.5-kg spheres are released from rest and gently nudged outward from the position theta0 and then rotate in a
Helium gas is contained in a rigid vessel of 0.5 m3 at 500 kPa. The gas is agitated violently by a stirrer that transfers 250 kJ of work to the gas. Assuming that the system undergoes an adiabatic process, determine the final pressure of the gas. Ass..
a piston has an area of 500 mm2. what mass must the piston has if it exerts a pressure of 50 kpa above atmospheric
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a structural support is installed within a space craft. the support is made of 7075-t6 aluminum plut t-ult 250 mpa and
axial flow coolant pump for one lop pressurized nuclear reactor has 75 m head 6m3s flow rate 1440rpm 800 mm diameter
question 1approximate the torque and power necessary to rotate the inner 20 cm diameter cylinder shown in figure 1. sae
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