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Consider a square house 40 ft on a side, 10 ft high, with a flat roof on top and walls/roof that is 8 inches thick. The thermal conductivity for an un-insulated wall or roof is 1.6 W/Km, while with fiberglass insulation its 0.04 W/Km. Assume that the average internal temperature is balmy 70ºF and the external temperature is a chilly 0ºF. If we use electrical heating and the cost of electricity is $0.16 per kWh, calculate the amount of money you'd spend each month of heating in each case, and how much you'd save per month if you insulated the house.
find the shortest length L of the line open-circuited at its load end so that the input impedance of the line at frequency f = 5GHz is the same as the impedance of a capacitor of capacitance C=10pf of the same frequency.
Instead of recreating the design every time we change the instruction ROM, we want to have a way to change the instructions while the system is running. Discuss how the UART can be used to fill an instruction RAM instead
A 3 phase 50hz star connected motor has rotor resistance and stand still reactance of 0.025ohm and 0.35 ohm respectively. The full load slip is 5% calculate the resistance per phase of a star connected rheostat
Assume, the program is to start at $C000. The program is to sort a block of 8-bit data where the starting address of the data block is stored at location $8000/8001 and the 8-bit data where the starting address of the data block is stored at $8002..
Your friends Alice and Bob have two children. You recall that one is a boy. What is the probability that the other is a girl Hint: Think carefully about the sample space.
(a) What is the magnitude of the average acceleration of a skier who, starting from rest, reaches a speed of 9.38 m/s when going down a slope for 3.89 s (b) How far does the skier travel in this time
An experiment consists of tossing a fair coin four times in succession. What are the possible outcomes Now count up the number of outcomes with three heads. If the outcomes are equally probable, what is the probability of three heads
A 3-phase, 2300 V, 60 Hz, 12-pole, Y-connected synchronous motor has 4.5 ? per phase synchronous reactance and negligible stator winding resistance. The motor is connected to an infinite bus and draws 250 A at 0.8 power factor lagging.
A combinational logic circuit has 3 outputs as described below: F1=Minterm(0,3,4) F2= minterm(1,2,7) F3= Maxterm=(0,1,2,4) Implement the circuit using a single decorder with active high outputs and external 2 input OR gates
You are working with a design team on a new product and are assigned to design the power supply. The requirements for the power supply are as follows: Input AC: 115 V AC +- 10%, 50-60 Hz Outputs: +5 V DC at 100 ma, +-12 V DC
The nameplate on a 50-MVA, 60-Hz single-phase transformer indicates that it has a voltage rating of 8.0-kV: 78-kV. An open-circuit test is conducted from the low-voltage side, and the corresponding instrument readings are 8.0kV, 62.1A, and 206kW.
A sample of vinegar is 4.8% acetic acid, HC2H3O2, by weight, andhas a density of 1.00g/mL. Calculate (a) the grams of acetic acidin 1 liter of vinegar (b) the molarity of acetic acid invinegar. calculate the concentration of an ..
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