Solar radiation is incident on the outer surface of a spaceship at a rate of 420 btu/h·ft2. the surface has an absorptivity of αs = 0.10 for solar radiation and an emissivity of ε = 0.6 at room temperature. the outer surface radiates heat into space at 0 r. if there is no net heat transfer into the spaceship, determine the equilibrium temperature of the surface.

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.

Select any two (2) areas of applications of chain-drive. (clo4) a)-permanent lubrication necessary b)-hydraulic forklift truck operation c)-rigging and heavy moving materials d)-relatively high maintenance costs e)-costlier than belt drives

Aquick transition of the operating speed of a shaft from its critical speed will whirl amplitude. (a) increase (b) limit (c) not affect (d) zero