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1) When a thermocouple is moved from one medium to another medium at a different temperature, the thermocouple must be given sufficient time to come to thermal equilibrium with the new conditions before a reading is taken. Consider a 0.1 cm diameter copper thermocouple wire originally at 150 oC. Determine the temperature response (temperature variation with time) when this wire is suddenly immersed in a) water at 40 oC (h= 80 W/m2 K) and b) air at 40 oC (h=10 W/m2.K). Given that for copper k=391 W/m K, c=383 J/kg K and ??=8930 kg/m3. Please comment on the results.
2) A heating contractor must heat 0.2 kg/s of water from 15 oC to 35 oC using hot gases in cross flow over a thin walled tube.
Your assignment is to develop a series of design graphs that can be used to demonstrate acceptable combinations of tubes dimensions (D and L) and plot gas conditions (T∞ and V) that satisfy this requirement. In your analysis, consider the following parameter ranges: D= 20, 30, and 40 mm; L=3, 4. Or 6 m; T∞=250, 375, or 500 oC; and 20 <= V<= 40 m/s.
Chemicals for Indoor Concrete Flooring, - indoor concrete maintenance chemicals used on indoor concrete flooring
Component Mass in Final State, Please solve specific problem below rather than providing examples. A rigid vessel having a volume of 0.028m^3 initially contains a mixture at 21 degrees Celsius and 100 kPa consisting of 79% Nitrogen
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Application of reverse osmosis principles for the desalination of sea water
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Discuss how transmission electron microscopy (TEM) can provide information complementary to that which can be obtained from standard X-ray or neutron diffraction methods, giving suitable examples.
question 1a handling operations for solidpowder substances are often a source of dust generation and are a source of
ECH 3023: Mass Balance around two distillation Columns Using Excel, Derive the simultaneous linear mass balance equations for the system using all the information provided.
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Design a Heat Exchanger for the Following Duty: Reduced crude oil leaving a distillation unit with a flow rate of 3166.04 kL/d at 268 oC and is to be cooled to 243 oC by exchange with 62.8 kg/s pre-flashed crude oil coming from pre-flash unit at 206 ..
question 1suppose the system shown below. initially the gas is at 200 kpa and occupies a volume of 0.1 m3. the spring
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