Under the same pressure increment, the time for 80% consolidation of a 25-mm thick clay specimen (drained at top and bottom) in the lab is 40 minutes. How long will it take for this 10-m thick clay in the profile to undergo 65% consolidation

Air is flows through an adiabatic nozzle with an inlet pressure of 400 psia at a temperature of 300°f and a velocity of 20 ft/s. the outlet pressure is 40 psia and the velocity is 800 ftl/s. determine the outlet temperature of the air using: a) property tables b) specific heat (using the specific heat value for air at 300°f)