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A tungsten wire (0.005mm in dia and 2 mm in length) is placed horizontal in stagnant air. If we need to maintain the wire at a temperature of 250oC, what should be the rate of electrical heating (in Watts) that should be applied to the wire so that its temperature can be maintained? Recalculate the above if there is an airflow of 10m/s perpendicular to the wire.
What of diameter of steel rod is required to support a tension load of 44.5kn?assume that the allowable stress for the steel is F=165n/mm.
based solely on static elevation head if the water level in a city water tower is 860 feet above sea level and the
an fcc iron-carbon alloy initially containing 0.20 wt c is carburized at an elevated temperature and in an atmosphere
a new bathroom 7 feet x 11 feet x 8 feet high with two 2 adjacent exterior walls that are insulated with 3.5 inches of
draw the projections of a rhombus having diagonals 125mm and 50 mm long, the smaller diagonal of which is parallel to both the principal planes, while the other is inclined at 30 to the H.P.
Determining Feasibility, At steady state, a new power cycle is claimed by its inventor to develop 6 horsepower for a heat addition rate of 400 Btu/min
Hazen-Williams Formula- Find the Diameter of a Pipe, The length of cast-iron pipe is to be 4200 ft., and the head causing flow is to be 12.6ft. After the pipe has been in service 5 years, it is expected to discharge water at a rate equal to 3.2 cf..
two resistors are given r1 470 ohms and r2 1200 ohms a the two resistors are connected in series with a 48 v source.
the diffusion constant do and activation energy q of c in bcc fe is 0.01 cm2sec and 80kjmol respectively. in fcc fe the
A spur gear has 48 teeth with a diametral pitch of 8 and a pressure angle of 20 deg. The face width is 0.75 inches. If the gear is transmitting 25 HP at 250 rpm
A heat pump with a COP (coefficient of performance) of 2.8 is used to heat an air-tight house. When running, the heat pump consumes 5 kW of power
the compression stages in the axial compressor of the industrial gas turbine are close coupled making intercooling very
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