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Consider an air cooler where the flow rate of liquid is large compared to the air, and the effectiveness, e, of the cooler is known to depend on the flow rate of air according to the relation, e ~ mair^-0.3 . The air inlet temperature is 25oC and the liquid inlet temperature is 120oC.
a. If the airflow rate increases 80%, the percentage increase in the heat removal is __________ At a given airflow rate the outlet air temperature is 55oC
b. When the airflow rate increases 50%, the heat transfer increases 20%, the new air outlet temperature is __________
c. When the airflow rate increases 100%, the heat transfer increases 40%, the new air outlet temperature is
the motion of a particle is defined by the position vector r=a(cos t + t sin t)i + A(sin t-t cos t)j, where t is expressed in seconds. Determine the values of t for which the position vector and acceleration are.
a 1500-kg car enter an s-curve at a with a speed of 96 kmh with brakes applied to reduce the speed to 72 kmh at a
a gas power cycle compresses air at 1 bar and 300 k state 1 through an adiabatic reversible compressor to 6 bar state
you are manufacturing a frame for a vehicle out of some aluminum alloy 6061-t451 tubing. the frame is to be welded
what would be the effect on the calculated value of the vane efficiency for mass of jockey in error by 0.001 measurements.
An adiabatic vessel contains steam at 180 [C] and 116 [kPa]. The volume is 0.5 [m^3]. Steam at 150 [C] with a quality of 0.85 is fed into the vessel until the flow stops. What are the final pressure and temperature inside the tank? What is its qualit..
a 9 m3 tank has two sections separated by a membrane both of which contain nitrogen gas. the nitrogen in section a has
Consider the Newtonian fluid with constant viscosity u and density p flowing between two parallel plates. The plates have a surface area of . The fluid velocity profile is parapolic in shapre and given by Vx=aLy-4ay^2.
Calculate the torque required at input T and calculate the magnitude and direction of the torque required to hold the gearbox stationary (holding torque Th). Show the direction of the holding torque applied to the shaft with the aid of a sketch.
if a fraction of steam is removed from the turbine at 2000kpa passed through a closed water heater followed by a trap
the 90-kg man dives from the 40-kg canoe. the velocity indicated in the figure is that of the man relative to the canoe
You have a large pin made from aluminum with a diameter of 0.01 m. This pin is needed to hold something from the ceiling. You install the pin into a hole of diameter 0.01 m in a piece of tungsten; assume a "perfect press fit". It was very hot, 323K, ..
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