A 0.0508 m thick aluminum plate is initially uniform in temperature at 27°C. Suddenly the plate is immersed in a convection environment T = 100°C, h=9,330 W/m2°C. Evaluate thermal properties of the plate at 27°C. Consider the following:

i) Determine the time (s) for the mid-plane temperature to reach 70°C.

ii) For the same time as in part (i), calculate the surface temperature (°C).

Line joining liquid phase with liquid and solid phase mixture is known as: a) liquidus b) solidus c) tie line d) none of the mentioned

If a particle moves along a path such that r : (3 sin t) m and ? : 2t rad, where t is in seconds. what is the particle's acceleration in m/s in 4 seconds? a)- 16.43 b)- 16.29 c)- 15.21 d)- 13.79

An ideal otto cycle with air as the working fluid has a compression ratio of 8. the minimum and maximum temperatures in the cycle are 300 k and 1340 k. use constant specific heats at room temperature to determine (a) the amount of heat transferred to the air during the heat- addition kj/kg, (b) the thermal efficiency, and (c) the thermal efficiency of a carnot cycle ope limits. process, in rating between the same temperature