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Consider a stable nocturnal boudary layer in a 12 hr night. The wind is blowing at 5 m/s and the surface is cooled with a kinematic heat flux of -0.02 K.m/s. The residual layer potential temperature is theta=25 degree centigrade.
a) what is the potential temperature profile at the end of the night?
b) plot the evolution of the height, h, of the stable boundary layer and the strength, delta thetas, as a function of time.
Motor M draws in the cable with an acceleration of 4 ft/s2, measured relative to the 200-lb mine car. Determine the acceleration of the car and the tension in the cable. Neglect the mass of the pulleys.
An Industrial water shutoff valve is designed to operate with 30lbs of force and will encounter 200lbs of resistance force applied to a 1.5in diameter axle. What is the required actual mechanical advantage of the system?
Taking the temperature of the surrounding surfaces to be 20°C also, determine the rate of heat loss from the steam pipe.
Irrigation system
this would provide you with a set of Reynolds numbers. Next, using the integral method, determine the velocity profiles within the boundary layer to be followed by determination of the heat transfer coefficient values for your selected Reynolds numbe..
a 14-ft long ladder leans against a wall with the bottom of the ladder placed 4ft from the base of the wall. how high on the wall will the ladder reach.
A block and tackle system with nine supporting strands is used to lift a metal lathe in a manufacturing plant. The motor being used to wind the cable in the pulley system can provide 100 lb. of force.
Saturated water vapor at 200oC is isothermally condensed to a saturated liquid in a piston-cylinder device. Calculate the heat transfer and the work done during this process in kJ/kg.
Coal discharged from a dump truck with an initial velocity (v)= 1.8m/s at 50 degrees falls on conveyor belt B. Determine the required velocity v(B) of the belt if the relative velocity with which the coal hits the belt is to be vertical.
A hot upsetting of stainless steel 316/316L, 2000mm dia disc, 200mm thickness is upset at 1200 degree Celsius to 150mm thickness. what will be the Upsetting force required to forge this disc and what will be the yield stress at this temperature.
Important information about Pressure Cooker, Steam is leaving a pressure cooker whose operating pressure is 30 psi. It is observed that the amount of liquid in the cooker has decreased by 0.4 gal in 45 minutes after the steady operating conditions..
determine the final temperature °R, and the final pressure in lbf/in^2. Rair = 53.33 ft·lbf/lb·°R. Assume ideal gas behavior and solve problem using.
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