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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 are the application of backward diode
Determine the current drawn from a three-phase 440 V line by a three-phase 15-hp motor operating at full load, 90% efficiency, and 80% power-factor lagging. Find the values of P and Q drawn from the line. (Hint: 1hp = 746W)
A transformer is used to match an 8 ohm speaker to a 500ohm audio line. What is the turns ratio of the transformer what is the input voltage and output voltage when 15W is being delivered to the speaker
What is the data rate of a digital electrical communication system that uses 16 voltage levels to carry multiple bits with one voltage level, where each voltage level is kept at that level for a duration of 2 ms
Explain why the short-circuit method for determining the Thevenin resistance of a circuit cannot be applied if the circuit does not contain any independent current or voltage sources.
In US, electric wires are classified based on their gauge numbers. The larger the gauge number is, the smaller the diameter of the cross-section of the wire becomes. You are given four different types of wire with gauge numbers 1, 3, 7, and 8.
1) What type of chemical reaction is taking place 2) How many liters of 0.100 M HCl would be required to react completely with 5.00 grams of calcium hydroxide 3) If I combined 15.0 grams of calcium hydroxide with 75.0 mL of 0.500 M HC..
The charge is release from rest and accelerate through a potential difference of 100000v. (a) Find the speed of the sphere after the acceleration. (b) if the sphere (which is already up to its max)is fired directly at a fixed (can't move) charge q..
Three resistors R1, R2 and R3 are connected in series and a supply voltage of 240 V. If R2 = 2R1, R3 = 3R1 and the total power taken by the circuit is 480 watts. Calculate the power in each resistor.
Why can't a video signal such as an NTSC analog television signal be transmitted over a two km length of loaded twisted pair cable with a frequency range 300 Hz to 3,400 Hz? What is the bandwidth occupied by an NTSC video signal?
For each one of the 3 frequency responses, H(f), in parts (a), (b), and (c) do the following: i. Obtain the system's impulse response, h(t). ii. Indicate if the system is BIBO stable or not, and state why. iii. Indicate if the system is causal or not..
A GaAs device is doped with a donor concentration of 3e^15/cm^3 . For the device to operate properly, the intrinsic carrier concentration must remain less than 5% of the total electron concentration
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