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a 50 cm long 800 w electric resistance heating element with diameter .5 cm and surface temperature 120c is immersed in 60 kg of water temperature to 80c. also determine the convection heat transfer coefficients at the beginning and at the end of the heating process.
Draw the T-s diagram (hint: it would help to begin with a schematic of the cycle) and.
Determine the power of the pump. The efficiency of the pump is 65%.
Finding Metal Removal Rate In an electrochemical machining operation, the frontal working area of the electrode is 2.5in squared
Aeroplane Dynamics, Determine the steady thrust that would enable a 200-tonne airliner to reach its take-off speed (75 m sâ?'1), from rest, in 30 s
Two solid cylindrical rods (1) and (2) are joined together at flange B and loaded. If the normal stress in each rod must be limited to 110 MPa, determine the minimum diameter D required for each rod.
calculate the position of the quasi-Fermi levels for electrons and holes with respect to the intrinsic level (assume that ni=1.5x10^10cm^-3).
If the deflection of the gae fluid height, h, is 2 inches find the 1) velocity of the jet air and 2) the force exerted on the disk by the air.
A first class lever, in static equilibrium, has a 50lb resistance force and 15lb effort force. The lever's effort force is located 4 ft from the fulcrum.3. Using static equilibrium calculations, calculate the length from the fulcrum to the resista..
At the end of the isothermalexpansion, the pressure is 600 kPa and the volume is 0.4 m3. Assuming the ideal gas model for air, determine the thermal efficiency.
An air heater may be fabricated by coiling Nichrome wire and passing air in cross flow over the wire. Consider a heater fabricated from wire of diameter D=1 mm, L= 2m, electrical resistivity rho=10^-6 ohms, thermal conductivity k=25W/mK, and emiss..
The annual holding cost rate for this type of item has been estimated at 28%. What option is more economical?
determine the coordinates xc and yc of the point where the resultant load must act in order to produce uniform normal stress in the column.
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