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A room has 1000 ft2 of surface, of which 120 ft2 is to be heated, and the balance has an average surface temperature of 60°F. The air temperature in the room is 68°F. The room is occupied by light clothed adults at rest. Determine the surface temperature of the heated panel necessary to produce comfort if the air velocity is 20 fpm.
A heater is used to raise the temperature of a Thermodynamics classroom by 5.0 o C. Express this temperature rise in units of Kelvin? A heater is used to raise the temperature of a Thermodynamics classroom by 5.0 oC. Express this temperature rise in ..
2 kg of saturated liquid water at 1bar is compressed to 25bar and 100C in a water pump. Determine the change in internal energy (kJ) and enthalpy (kJ) of water in two ways. Using the compressed liquid tables
to what temperature would a constrained rod of aluminium with a diameter of 50 mm need to be heated if it is expected
Calculate the theoretical density of FCC Copper, which has an atomic radius of 0.128 nm and the atomic weight of 63.55 g/mol.
two forces each of magnitude p are applied to the wrench. the diameter of the steel shaft ab is 15mm. determine the
Derive at least four concept designs to satisfy the given specification - draw a central cross-section of the heat exchanger
a 2 kw resistance heater wire with thermal conductivity k 15 wm-k diameter d .4 cm and length 50 cm is used to boil
Determine the total mass of nitrogen (N2), in kg, required to inflate all four tires of a vehicle, each to a gage pressure of 180 kPa at a temperature of 25oC. The volume of each tire is 0.6 m^3, and the atmospheric pressure is 1 atm.
a full revolution has 100 rpm flywheel rotation. the press is equipped with two hand palm buttons mounted on the machine at a distance of 20 inches from the point of operation. How many engagement points on the flywheel would be necessary to make ..
the axial velocity profile for laminar flow in a pipe is given by ur umax 1-rrrr where r is radial position r is the
the fluid used is r-134a. the flow of r-134a is 70 lbmmin. if r-134a enters a compressor at -10 deg f and is a
a refrigeration cycle is a reversed heat engine. which of the following has the maximum value of the co-efficient of
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