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Derive an expression for the heat-loss conductance Uc for a flat-plate collector in which convection and conductance are completely eliminated in the air layers by use of a hard vacuum.
what other factors other than protection potential need to be taken into account when selecting a sacrificial anode
a steam turbine operates at steady state with a steam mass flow rate of 4600 kgh producing a power output of 1000 kw.
steam flows steadily through an adiabatic turbine. the inlet conditions of the steam are 10 mpa 450 c and 80 ms and the
calculate the steady state heat transfer rate in jmm2bulls through a rod of copper 10 mm thick if the temperature
A close-coiled helical spring is required to absorb 2.25 x l03 joules of energy. Determine the diameter of the wire, the mean diameter of the spring and the number of coils necessary if The maximum stress is not to exceed 400 MN/m2
why is it desirable and advisable for the jominy specimens to be held in the oven at the austenitic temperature for a
Describe the differences between project objectives and project scope definition. Define the interactive role of the owner and designer in this process to ensure a well-defined understanding between the two parties.
a 4mx5mx6m room is to be heated by a baseboard resistance heater. it is desired that the resistance heater be able to
For each case, determine the specified property value and locate the state by hand on sketches of the p-y and T-y diagrams.
Consider a system consisting of liquid water initially at T1 = 318 K, p1 = 3.5 bar undergoing a process to a final state at T2 = 353 K, p2 = 1.5 bar. Use appropriate equation with the data from the table to evaluate change in specific entropy.
helium gas flows through a well-insulated nozzle at steady state. the temperature and velocity at the inlet are 550or
During operation the jack hammer strikes the concrete surface with a force which is indicated in the graph. To achieve this the 2-kg spike S is fired into the surface at 90 m>s. Determine the speed of the spike just after rebounding.
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