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1. Why are rooftop units popular on small commercial buildings?
2. Explain what would happen if an HVACR contractor violated a bonded roof by putting in a vent pipe. 3. Could a packaged rooftop unit be adapted for both heating and cooling?
1- Use the half-reaction method to balance the equation Ca(s) +Cl2(g) --> CaCl2(s). 2-A sample of sodium chloride, NaCl, weighing 0.0678 g is placed in a 25.0-mL volumetric flask. Enough water is added to dissolve the NaCl, and then the flask is ..
Determine the reference voltage VR. - Determine the logic 0 and logic 1 levels at the outputs vO1 and vO2. - Determine the total power dissipated in the circuit for A = B = logic 0 and for A = B = logic 1.
A current sheet with K =10ax A/m lies in free space in the z =2m plane. A filamentary conductor on the x-axis carries acurrent of 2.5A in the axdirection. Determine the force per unit length on the conductor.
How do the concepts of capacity planning, scalability, and TCO apply to this case? Apply these concepts both to Amazon and to subscribers of its services.
What are the essential features of an ideal op amp? Identify the terminals of an op amp. Draw its equivalent circuit. Define virtual ground and what is difference amplifier? Draw its circuit. Define C.M.R.R.
prove that: 1. x[n]=x[n]*delta[n] 2.x[n-n0]=x[n]*delta{n-n0]
A 200 foot transmission line that has a loss of 6db per 100ft has 100 watts inserted from a transmitter at 4 MHz . How much power will actually be at the antenna feed point.
using a slotted line the voltage on a lossless transmission line was found to have a maximum magnitude of 1.5 v and a
Provide physical interpretations for the closed surface integrals of any two vectors of your choice.
A motor gives an output power of 20 kW and operates with an efficiency of 80 per cent. If the constant input voltage to the motor is 200 V, what is the constant supply current?
A series circuit consisting of a 0.398-henry inductor and a 212-µF capacitor is connected to a 125-volt variable frequency source. At what frequency will the circuit take a lagging current of 2.5 A a leading current of 2.5 A
Two capacitors, one 6.6 µF the other 29 µF, are connected in parallel across a 12 V battery.
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