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A thermodynamicist is attempting to model the process of balloon inflation by assuming that the elastic casing behaves like a spring opposing the expansion as presented in the figure. As air is admitted, the spring is compressed. The pressure in the gas space is given by P-Pi = k(L-Li) , k = const = 5 bar/m. The initial conditions in the gas space are Pi = 1 bar, Ti = 300 K, and Li = 0.15 m. The piston area is 0.02 m2. The air is an ideal gas and cv = 20.9 J/mol. K, independent of temperature. What is the air temperature in the gas space when L = 0.6 m? What is the entropy generation in the process and change in the availability of the system?
a fixed mass of water m initially a saturated liquid is brought to a saturated vapor condition while its pressure and
Explain the fundamental difference in scaling principles between a “time constant related system” and a “diffusion related system”. Briefly describe an example of how the similarity approach for the analysis of scaling can break down when applied to ..
1750g of air performs an expansion work of 3100kJ on the surrounding as it expands horizontally to a pressure of 63000 kPa and a volume of 0.065 cubic meters. Find the temperature of air and its initial volume
water flows upward through a variable area pipe with a constant flowrate q dz is the diameter of the variable area pipe
The Energy Equation is an expression of conservation of energy. However, the terms of the equation have dimensions of length. Each of the terms is called “head”. Discuss in your own words how each of these “head terms” relate to energy, and how the o..
find the phase compressed liquid superheated vapor saturated liquid saturated vapor or a mixture of saturated liquid
the rod ab slides through the pivoted collar as end a moves along the slot. if a starts from rest at x0 and moves to
two boys push on the gate as shown. if the boy at b exerts a force of fb 30 lb determine the magnitude of the force fa
assume that the velocity v of fall of an object depends on the height h through which it falls the gravity g and the
Determine the coordinates x' and y' of the centroid C of the area shown in the figure and calculate the moments of inertia of the area shown, about ox and oy axes.
the ball of mass m of negligible size is fired up the vertical circular track using the spring plunger. the plunger
carbon dioxide co2 modelled as an ideal gas flows through the compressor and heat exchangernbspshown in figure. the
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