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Ten pounds-mass of R-22 is at an initial volume of 4.059 ft3 and pressure of 200 psia. It is compressed isobaric ally until its volume is two-thirds of its initial volume. The piston is then held in place as the refrigerant cools until its temperature is 70 F. Determine the heat transfer [Btu] and work transfer [Btu] for the two-step process. Also show the process on P-v state diagram.
using excel find the value of the 97.5 confidence interval for a single-sample using the z variable and the students
A piston-cylinder device with a set of stops initially contains 0.6kg of steam at 0.8MPa and 500°C. The location of the stops corresponds to 60percent of the initial volume. Now the steam is cooled. Determine the compression work of the final state ..
a 1-mm-thick bcc iron foil is used to separate a region of high nitrogen gas concentration of 0.1 atomic percent from a
steam is to be condensed in the condenser of a steeam power plant at a temperature of 60c with cooling water from a
estimate the weight savings if a typical automobile engine 100 kg is made of aluminum instead of cast iron. assume the
If a super alloy jet engine is heated so that its length in each direction expands by 1%, what is its percentage change in volume (assume it is roughly cubic)?
a rigid container with a volume of 0.17m3 is initially filled with steam at 180kpa 340c. it is colled to 90c. a at what
Oxygen at 450K is heated to 850K. Assume oxygen as an ideal gas. Determine the change in internal energy and enthalpy of oxygen per unit mass, using: Data for line over u and line over h from the oxygen table
find max stress sigmatheta. the cylinder is hollow in the center one layer of steel inside and a layer of brass
silica sio2 is formed on silicon as an electrically insulating layer for microelectronic devices. silica is formed when
for a wind speed of 6 ms a stack gas exit velocity of 20 ms a stack diameter of 4 m a heat emission rate of 15 mw and
A thin electric heater is wrapped around a rod of diameter 3 cm. The heater dissipates energy uniformly at a rate of 1300 W/m. Air at 20°C flows normal to the rod with a velocity of 15.6 m/s. Determine the steady state surface temperature of the h..
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