Engineering, 13.08.2019 04:20 bighomie28
An organic aa egg can be approximated as a 5.5 cm-diameter sphere whose properties are roughly k=0.06 w/m°c and α=0.14x106m2/s. the egg is initially at a uniform temperature of 8°c and is dropped into boiling water at 97°c. taking the convection heat transfer coefficient to be h=1400w/m2°c, determine how long it will take for the center of the egg to reach 70°c.
Answers: 1
Engineering, 04.07.2019 18:10
The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false
Answers: 1
Engineering, 04.07.2019 18:10
The thermal expansion or contraction of a given metal is a function of the f a)-density b)-initial temperature c)- temperature difference d)- linear coefficient of thermal expansion e)- final temperature f)- original length
Answers: 2
Engineering, 04.07.2019 18:10
A-mn has a cubic structure with a0 0.8931 nm and a density of 7.47 g/cm3. b-mn has a different cubic structure, with a0 0.6326 nm and a density of 7.26 g/cm3. the atomic weight of manganese is 54.938 g/mol and the atomic radius is 0.112 nm. determine the percent volume change that would occur if a-mn transforms to b-mn.
Answers: 2
Engineering, 04.07.2019 18:10
Awall of 0.5m thickness is to be constructed from a material which has average thermal conductivity of 1.4 w/mk. the wall is to be insulated with a material having an average thermal conductivity of 0.35 w/mk so that heat loss per square meter shall not exceed 1450 w. assume inner wall surface temperature of 1200°c and outer surface temperature of the insulation to be 15°c. calculate the thickness of insulation required.
Answers: 3
An organic aa egg can be approximated as a 5.5 cm-diameter sphere whose properties are roughly k=0.0...
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