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1. The plate described in Problem 9.14 has been used in an experiment to determine the free convection heat transfer coefficient. At an instant of time when the plate temperature was 127°C, the time rate of change of this temperature was observed to be -0.0465 K/s. What is the corresponding free convection heat trans- fer coefficient? Compare this result with an estimate based on a standard empirical correlation.
2. Determine the average convection heat transfer coeffi- cient for the 2.5-m-high vertical walls of a home having respective interior air and wall surface temperatures of (a) 20 and 10°C and (b) 27 and 37°C.
a .005 m3 quartz tube is filled with proper proportions of liquid water and water vapor at 100 kpa. it is then sealed
Derive Laplace transform by integration from basic integral definition. Do not use laplace transform tables or associated theorems. Refer to standard integral tables.
refrigerant 134a is throttled from a saturated liquid at 70f to a saturated liquid-vapor mixture at 36.1 psia. what are
Determine the temperature at which the diffusivity D of Cu in Al is twice the diffusivity at 500K. Using your result for D of Cu in Al at 500K, estimate the distance that a Cu impurity would diffuse in Al at 500 K after 1 hour. Use the simple estimat..
a steel ring of 250mm diameter has a width of 50mm and a radial thickness of 5mm. it is split to leave a narrow gap of
Assuming that within metal crystals, the atoms can be considered as hard spheres in contact, sketch arrangement of atoms in a (100) plane, a (110) plane and a (111) plane of face-centered cubic structure. Determine the number of atoms contained wi..
Current airbag regulations specify that they must only pass a test designed to protect a 175 pound male who is not wearing a seatbelt. There is currently a discussion of lowering the explosive force by 30%, so that smaller-sized people (including wom..
Determine, the tensile stress in the component when first loaded, the temperature at which the stress will be zero if the component is rigidly held at its extended length.
initially an insulated rigid tank contains 18.67 kg of water at 21.45oc and 101 kpa. the tank also contains a 3.66 kg
Using the appropriate table, determine the change in specific entropy between the two specified states, in Btu/lb.oR. Show the states on a sketch of the T-s diagram.
a reciprocating engine for light aircraft modeled after the avco lycoming 0.235nbspengine has the following
if an automobiles braking distance from 60 mph is 150 ft on level pavement determine the automobiles braking distance
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