Engineering, 11.07.2019 04:30 savid88061
Aperson puts a few apples into the freezer at -15°c to cool them quickly for guests who are about to arrive. initially, the apples are at a uniform temperature of 20°c, and the heat transfer coefficient on the surfaces is 8 w/m^2c. treating the apples as 9-cm-diameter spheres and taking their properties to be ρ=840 kg/m3, k-0.418 w/m"c, α =1.3 x 10^-7 m^2/s, cp=3.81 kj/kg."c, determine the center temperature of the apples in 1 hour.
Answers: 2
Engineering, 04.07.2019 18:10
Steel is coated with a thin layer of ceramic to protect against corrosion. what do you expect to happen to the coating when the temperature of the steel is increased significantly? explain.
Answers: 1
Engineering, 04.07.2019 18:10
Afull journal bearing has a journal diameter of 27 mm, with a unilateral tolerance of -0.028 mm. the bushing bore has a diameter of 27.028 mm and a unilateral tolerance of 0.04 mm. the l/d ratio is 0.5. the load is 1.3 kn and the journal runs at 1200 rev/min. if the average viscosity is 50 mpa-s, find the minimum film thickness, the power loss, and the side flow for the minimum clearance assembly.
Answers: 1
Engineering, 04.07.2019 18:10
Which one from below is not one of the reasons of planning failures? (clo3) a)-planner is careless. b-planner spend less time in the field but more time on the desk c)-planner is not qualified d)-planner does not have sufficient time to properly plan
Answers: 3
Engineering, 06.07.2019 02:30
In a unit cell of fcc structure, indicate the position of one of the tetrahedral interstitial sites by plotting the corresponding tetrahedron. do the same for one of the octahedral interstitial sites (in a separate fcc unit cell). mark the positions of all the tetrahedral and octahedral interstitial sites in the unit cells. how many equivalent tetrahedral sites and how many equivalent octahedral sites are contained in a fcc unit cell, respectively. what is the coordination number for a tetrahedral site and what is the coordination number for an octahedral site?
Answers: 2
Aperson puts a few apples into the freezer at -15°c to cool them quickly for guests who are about to...
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