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A nickel-coated heater element with a thickness of 15 mm and a thermal conductivity of 50W/m · K is exposed to saturated water at atmospheric pressure. A thermocouple is attached to the back surface, which is well insulated. Measurements at a particular operating condition yield an electrical power dissipation in the heater element of 6.950 x 107 W/m3 and a temperature of To = 266.4°C.
(a) From the foregoing data, calculate the surface temperature, Ts, and the heat flux at the exposed surface.
(b) Using the surface heat flux determined in part (a), estimate the surface temperature by applying an appropriate boiling correlation.
A wattmeter connected to a 240-volt 60 Hz series RL circuitindicates a reading of 691 watts. A clamp-on ammeter used to measure current flow indicates a current of 4.8 A.
Suppose you are designing a power amplifier for a loudspeaker which has an equivalent resistance of 150 . What should be the Thevenin equivalent resistance of the power amplifier in order to maximize the power transfer to the loudspeaker
Design a two-levelcombinational logic circuit to implement theadditionof two 2-bit numbers. Donot use half adders or full adders as building blocks forthis circuit. Rather, follow the logic circuit design process discussed in class.
A proportional controller for a rotating antenna has a gain Kp of 5 in-oz/deg. The antenna was initially pointing due south, but was then commanded to point southeast. What is the torque when the antenna gets to within 5o
If a 100 W light bulb illuminates the ceiling with a beamradius of 2m at a distance of 4m, calculate the intensity of thelight on the ceiling. The light bulb has an efficiency of 15%(i.e., only 15% of the total power provides light power.)
A uniform plane wave propogates in the positive z direction with a frequency of 20 MHz. A probe is at z=0 m measuring the phase to 98 degrees and another probe at z= 2 m measures the phase to be -15 degrees what is the relative dielectric constant..
Assume the ASCII code is used for each character with an additional parity bit (in the most significant bit position, at left). Each character in ASCII is using 8 bits. Even parity is used. What english word is coded by the following Hexadecimal se..
If the magnitude of the resultant force is to be 460N , directed along the positive y axis, determine the magnitude of force F. If the magnitude of the resultant force is to be 460N , directed along the positive y axis, determine the force F direc..
Design an active first-order RC low-pass filter (using a 741 op-amp) with a cut-off frequency of 10 kHz and a band-pass gain of 20 dB. Derive the step response and voltage transfer function.
If you are going to use a Yz5 to lower a voltage of 13.8kV down to208V,m and are specifying the three single phase transformers that you will use, for each of the single phase transformers, what is its rated primary voltage, rated secondary voltag..
a collector modulated transmitter has a supply voltage of 48 v and an average collector current of 600 ma. what is
A balanced delta connected load of 15 + j18 ohms per phase is connected at the end of a three-phase line. The line impedance is 1 + j2 ohms per phase. The line is supplied from a three-phase source with a line-to-line voltage of 207.85 V rms.
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