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Derive an equation for the lines of constant declination in a sunpath diagram, for example, Figure 2.12. Check your equation by plotting a few declination lines on a piece of polar coordinate graph paper.
The principle of component independence means that it ought to be possible to replace one component with another that is implemented in a completely different way. Using an example, explain how such component replacement could have undesired conse..
a mercury-in-glass thermometer has 12 gram of mercury in bulb. the design requires that if temperature increases by
An open pan of 150 mm diameter and 75 mm deep contains water at 25 C and is exposed to atmospheric air at 25 C and 50% R.H. Calculate the evaporation rate of water in grams per hour.
chilled water enters a thin shelled 4 cm diameter 200 m long pipe at 7 deg. celsius at a rate of 0.98 kgsec and leaves
Steam enters a nozzle with an inlet are 1m^2 at velocity of 40 m/s a pressure of 900 kpa and a temperature of 300 C. The outlet pressure is 750 kpa. Assume the nozzle operates isentroically and adiabatically, indicate the enthalpy, entropy, specific ..
a solar-thermal power plant uses ideal rankine with r-134a. mass flowrate is 5000 kgs. the sat. vapor enters the
An Emperor penguin in Antarctica may be modeled as a cylinder 1m high with a diameter of 0.2m. The male Emperor penguin warms his egg for sixty-four days during the Antarctic winter (no solar input), in deep sub-zero temperatures. During this time th..
The curved wall is well-insulated and may be regarded as adiabatic. Heat transfer between the surfaces occurs only by radiation.
consider a cogeneration power plant modified with regeneration. steam enters the turbine at 6 mpa and 450 celsius and
an ideal gas undergoes a two-step process. beginning at state 1 it is pressurized at constant volume to state 2. then
air enters an adiabatic compressor at 20 degc and 100 kpa at a rate of 2 kgs and exits at 700 kpa. if the power input
refrigerant 134a is compressed at steady state from 2.4 bar 0oc to 12 bar 50oc. refrigerant enters the compressor with
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