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A 3 cm diameter bar 3 m long is attached to two walls on either end of the bar. The walls are at a temperature of 100 degrees C. The thermal conductivity of the bar is 150 W/mK. The outside of the bar is exposed to air at 32 degrees C. The film coefficient between the bar surface and the ambient air is 7.5 W/m^2K. Using a node spacing of 0.5 m, estimate the steady state temperature at the middle of the bar.
steam enters a well insulated nozzle operating at steady state at 1000of and 500lbfin2 and velocity 10fts. at the
water flows steadily through an outflow nozzle. known conditions are d1 15 cm v1 3 ms d2 9 cm. assume that the water
Design a flat roof meeting certain mechanical performance criteria. The basic structure of the roof is a series of rectangular-section 'joists', made from softwood, that span the space to be covered by the roof.
intake air to turbocharger for internal combustion engine is 100kpa at 300k. determine the turbocharger pressure ratio
a liquid at 10 c kinematic viscosity of 1.30710-6 m2s is to flow from a roof-top reservoir to a tanker truck through a
water at a temperature of t 25oc flows over one of the surfaces of a steel wall aisi 1010 ks 61.7wmk whose temperature
The heat transfer coefficient in the oven is 25W/m^2K. Calculate rate of heat transfer per m^2 area.
Knowing that the modulus of elasticity of brass is 105 GPa, determine the magnitude of the load P for which the deflection of the plug is 1,25 mm downward.
describe external threading operations. explain the external threading operation in details. why is it important to
a truncated cone 20 cm high is constructed of aluminum. the diameter at the top is 8 cm and the diameter at the bottom
A construction crew lifts approximately 560 lb of material several times during a day from a flatbed truck to a 32 ft rooftop. A block and tackle system with 50 lb of effort force is designed to lift the materials.
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.
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