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Determine the number of colectors required and the cost of auxiliary power in a facility that provides hot water to a community of 34 residents. Which would be studied the benefit of placing the panels tilted at 18 degrees relative to the horizontal place because installers additional 3 dollars charged per m 2 of the collector by installing inclined. The characteristics of the system are:
Daily consumption: 55 liters / userArea sensor: 2.06 m ^ 2Efficiency equation: n = 0.77-5.88TTemperature: 45 CAuxiliary Power: Electric ($ 0.22 / kWh)Inclination for sensors: 0-18 (degrees)Monthly Occupancy: 100% except in the months of June, July and August which vary from 95%, 85% and 90% respectively
What causes the current gain to decrease both in the case of a low collector current and at a high collector current?
the N-type P-type doping levels of a silicon p-n junction are nd=na= 5x10^16 cm^-3 caltulate the built in voltage Vbi a) at a room temperture b) at 300c c) at 700 c (ni= 1.10x1018 cm^-3) does a negative value for Vbi mean anything
Assume all the capacitors in the circuit below were discharged prior to assembly. The capacitors, resistors, and voltage sources are then arranged as shown in the circuit below. The circuit is then allowed to stabilize.
1. What is the force on a 10 cm wire carrying 1.0 A in a uniform magnetic field of 500 gauss 2. In the above example, if the current is in a loop of width 6.0 cm and the coil lies in the plane of magnetic flux, what is the torque on the loop
find the complete functions, p(t) and w(t) supplied by the element, not just a number, and graph p(t) and w(t). Choose appropriate intervals of time for your graphs. Assume that both v(t) and i(t) are zero for t
What is the system's Nyquist sample rate if ω0 = 1000/(2π) rad/sec.?
The mass spectrometer measurement section is a region of uniform magnetic field B= ˆxBms for z > 0. Ions enter the magnetic field (which exists for z > 0) at the origin with a known velocity +ˆz vz.
A known vapor pressure value for ethanol is 221.3 mmhg. what temperature does this vapor pressure compressed to when compared to ethanol's boiling point.
A band filter has the following specs: Center frequency: 1500 Hz Bandwidth: 200Hz Chebyshev filter with a passband ripple of 1 dB 20-dB attenuation of te stopband gains at 1200 HZ and 1800 HZ. Determine the order of the lowpass prototype function.
how the amplifiers should be connected. To proceed, evaluate the two possible connections between source S and load L, namely, SABL and SBAL. Find the voltage gain for each both as a ratio and in decibels. Which amplifier arrangement is best
3) What is the RMS voltage of the source in a single loop series circuit if Irms = 1A-30° and Ztotal = 100 65° 4) What is the power dissipated by an electric heater with a resistance of 20? drawing a current waveform of i(t) = 10 sin(60t) Amps
A digital communication system transmits one of the three values -1,0,1. A channel adds noise to cause the decoder to sometimes make an error. The error rates are 12.5% if a -1 is transmitted, 75% if a 0 is transmitted, and 12.5% if a 1 is transmi..
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