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1. Explain the advantages that unit-ventilator-type FCUs have in schools.
2. List the major components in most AHUs.
3. State the reason a properly sized AHU fan and motor usually requires field adjustment during the final start-up/commissioning phase.
Derive the three-term error correction formula. Include the appropriate signal flow graphs in all of your derivations. Hint: The one-term and both two-term error models are simplifications of the threeterm error model.
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.
a conductor is connected to a battery and placed between two compasses. An electric current is then passed through the conductor. In what direction do the poles of the compasses point.
Five periods of the signal s(t)=sin(2500pi*t) are sampled at a sampling frequency of 4000 Hz. a. Does this sampling frequency meet the Nyquist requirement for the signal? b. How many samples are collected
Wastewater leaving the ACME cheese factory must be neutralized to a pH between 6.8 and 7.2. Citric acid is available to decrease pH and sodium hydroxide is used to increase pH.
A 9-V flashlight battery has a rating of 1.8kWh. If the bulb draws a current of 100mA when lit; determine the following: a)For how long with the flashlight provide illumination b)How much energy in joules is contained in the battery
A pulsar lies 1000 light years from Earth. The average plasma concentration is 1 el/cc. Using the plasma dispersion relationship for group speed, what is the group delay between a pulsar pulse received at 1 GHz and at 800 MHz
A circuit connected in series contains a voltage source of 20 V, a 5 ohm resistor, and a variable resistor, R.
Calculate the power dissipated when 5.5 V is applied across a resistor and 3 mA flows through it.- Determine the voltage of each node with respect to ground.
Deer ticks can carry both Lyme disease (L) and human granulocytic ehrlichiosis (H). In a study of ticks in the Midwest, it was found that 16% carried L, 10% carried H and 25% that had either L or H carried both.
A voltage v(t) = 24cos(2000t-45°)V is applied across a parallel connection of a 5-kΩ resistor and a 100-nF capacitor. Find the steady-state current i_c(t) through the capacitor and the steady-state current i_R(t) through the resistor.
Write two equations for the mesh currents shown in standard form. find the values of i1 and i2 find the voltage V (over the 2 Ohms resistor) and the current i (over the 3 Ohms resistor)
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