A vertical piston-cylinder assembly contains 0.5 kg of unidentified substance; take the unidentified substance to be the system. Initially, the piston is resting against the stops when the system pressure and temperature are 4.00 bar and 0°C, respectively. The piston has a mass of 75 kg and face area of 0.184 m2; local atmospheric pressure is 1.01 bar; local gravitational acceleration is 9.81 m/s2. (1) What system pressure would be required to lift the piston from the stops? (2) Thinking about substance as the system, is the system best described as open, closed, or isolated? Why? (3) Are changes in kinetic and potential energy negligible for the system in this case? Why? (4) How much heat transfer must occur to the system in order to begin to lift the piston from the stops? (5) Once the piston is lifted from the stops, will the system pressure change? Why? (6) Assuming that the system's pressure remains constant, find the work in kJ for the volume to increase by 15% (ie. V2=1.15*V1). Carefully indicate the direction (i.e., what is the work that you reported being done on or by?) (7) Suppose the heat transfer stops, and the substance is allowed to come to an equilibrium temperature with its environment at 25 °C. What phase(s) will the substance be?

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When force P is apliced to the rigid arm BC, point B moves downward 0.2mm. Determine the enlongation developed in wire CD: ___ mm. Calculate your answer to 2 digit place.

22 CUSTOM GENERATED PROBLEMS 3-34. Romeo tries to reach Juliet by climbing with constant velocity up a rope which is knotted at point A. Any of the three segments of the rope can sustain a maximum force of 2 kN before it breaks. Determine if Romeo, who has a mass of 65 kg, can climb the rope, and if so, can he along with his Juliet, who has a mass of 60 kg, climb down with constant velocity? ********* 60° Prob. 3-34 C Comm 2 4-2. resulta

b) You are given a set of six links. The lengths of the links are as follows: 6.3cm, 9.1cm,12.4cm,15.6cm,20cm,40.2cmSketch a crank-rocker mechanism you can realize using a selection of four links from the set.

Select the correct statement regarding the solid model shown below. pattern1 It is easiest to create the 18 holes in this model by sketching each individual hole and using the extruded boss/base feature. It is easiest to create the 18 holes in this model by sketching one individual hole