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A boiler used to generate saturated steam is in the form of an un-finned, cross-flow heat exchanger, with water flowing through the tubes and a high-temperature gas in cross flow over the tubes. The gas, which has a specific heat of 1120 J/kg · K and a mass flow rate of 10 kg/s, enters the heat exchanger at 1400 K. The water, which has a flow rate of 3 kg/s, enters as saturated liquid at 450 K and leaves as saturated vapor at the same temperature. If the overall heat transfer coefficient is 50 W/m2 · K and there are 500 tubes, each of 0.025-m diameters what is the required tube length?
(1) a lighting load drawing 10kW, (2) an induction motor drawing 10 kVA at 0.9 power factor lagging, and (3) a synchronous motor operating at 10 hp, 85% efficiency and 0.95 power factor leading (1 hp = 0.746 kW). Determine the real, reactive, and ..
A sinusoidal voltage has a maximum value of 100V, and the value is 10V at t=0. The period is T=1ms. Determine v(t)
Assume both antennas are ideal.
Three 25.0KVA, 4801120VAC, single-phase, 60Hz transformers are connected delt-delta. The load on the bank is 50.0KVA, balanced load, with power factor of 1.0. A fault in one transformer required its removal, and the bank is operating open-delta. D..
The work-piece motion of a certain system is measured using an LVDT that outputs 12mV/cm. (i) If the output from the LVDT ranges from -12mV to 24mV, what is the maximum horizontal motion of the work-piece motion
First, generate an array of 20 input random integers in the range between 0 to 30 and display. Then, sort the generated 20 random integer numbers in ascending order using "THE SELECTION SORT" method and display your sorted output data flow chart.
The DC machine rotates at 1500 RPM and it delivers rated current at rated terminal voltage. The field winding is connected to a 120 V supply. Find the value of the field current and the value of R (field control resistance) required.
Using a 500 Ohm resistance, design an RC low-pass filter that would attenuate a 120-Hz sinusoidal voltage by 20 dB with respect to the DC gain.
How to Analyze Electric Circuit through Norton's Theorem ? ( Need an easy step by step procedure with examples )
introin this design you are going to use a chain of flip-flop to implement a shifter register.design requirementwhen
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.
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
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