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An object of irregular shape 1 m long maintained at a constant temperature of 100°C is suspended in an airstream having a free stream temperature of O°C, pressure of I atm, and a velocity of 120 m/s. The air temperature measured at a point near the object in the airstream is 80°e. A second object having the same shape is 2 m long and is suspended in an airstream in the same manner. The air free stream velocity is 60 m/s. Both the air and the object are at 50°C, and the total pressure is 1 atm. A plastic coating on the surface of the object is being dried by this process. The molecular weight of the vapor is 82 and the saturation pressure at 50°C for the plastic material is 0.0323 atm. The mass diffusivity for the vapor in air at 50°C is 2.60 x 10-5 m2/s.
(a) For the second object, at a location corresponding to the point of measurement on the first object, determine the vapor concentration and partial pressure.
(b) If the average heat flux q" is 2000 W/m2 for the first object determine the average mass flux n"A (kg/s · m2) for the second object
1.The Thyristor is a natural commutation device. What does that mean. 2.Mention two reasons why the HVDC might be your choice as a power system designer to transfer large amount of power.
deposit Aluminum with a deposition rate of 100 nm/min. The substrate temperature is 300K. During the deposition, your chamber has an air leak that provides a residual O2 partial pressure of 10-6 Torr.
A silicon ingot is doped with 1016 arsenic atoms/cm3. Find the carrier concentrations and the Fermi level at room temperature (300K). Hint: assume complete ionization of impurity atoms at room temperature.
Design an interface for a 12 V, 500 mA bipolar stepper motor. There are 200 steps per revolution. Write software to spin the motor at 1 rps.
Assume the resistance of a certain type of resistor is normal distrubuted random variable with mean =12.8 ohms and standard diviation of =1.3ohms. if a single reistor is to be randomly selected from the process producing resistors.
2) A device that responds to a small current or voltage change by activating a mechanical switch allowing a larger amount of current flow is 3) Where does a program transfer to when an interrupt occurs Interrupt vector table Interrupt service ro..
Three hard-drawn copper conductors with a 1 inch diameter and 1 m spacing in a triangular configuration. (Note that 1 mile = 1.609 km). 1. Calculate the dc resistance in ohms per mile ( p = 1.77 × 10-8-m).
A pressure measurement system is stated as having the following characteristics. Range: 0 to 140 kPa; Accuracy: ±1.5% of the displayed reading; Temperature sensitivity: ±0.1% of the reading per °C If the instrument indicates a pressure of 120 kPa
Indicate what data type you would use for the following variables: (a) the temperature (b) the number of days in a week (c) the number of days in a year (d) the number of months in a year
question 1.let us assume there is a two-terminal box. there are one resistor one capacitor and one inductor inside the
Derive a minimum cost realization of the four varible function that is equal to 1 if exactly two or exactly three of its variables are equal to 1; otherwise it is equal to 0. find the minimum cost SOP and POS forms for the function f(x1,x2,x3,x4)= ..
This washing machine would have a fill cycle to one level, a 10 second wash cycle, a 10 second rinse cycle and then drain. Include a start button, low level switch, high level switch, an agitator motor, a fill valve and a drain valve.
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