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katen-ka-za [31]
3 years ago
10

A drive-through system at a fast food restaurant where the first facility takes the order, the second takes the money, and the t

hird provides the food is an example of: multiple-channel, multiple-phase arrangement. single-channel, multiple-phase arrangement. single-channel, single-phase arrangement. single-channel, multiple-phase arrangement.
Engineering
1 answer:
Fynjy0 [20]3 years ago
7 0

Answer:

single-channel, multiple-phase arrangement.

Explanation:

A single channel and a multiple phase arrangement system in a queue is the technique where a customer in a queue goes through the point where there is more than one point of activity.

In the context, in a food restaurant where there are many point of activity for a single channel of ordering food. Here in the first facility, it receives the order and second facility takes money while the other provides the food to the customer. This is an example of single channel and a multiple phase arrangement.

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Structural engineers, designing an eighty-story office building, need to account for sway. They would most likely use a(n) ____
tia_tia [17]

Answer:

I would say a level

Explanation:

A level is used as a horizontal reference line, which will tell if the building is leaning to one side, or if its up right. I may be wrong but this is the closest thing I can think of for this question.

8 0
3 years ago
A balanced three phase load is supplied over a three-phase , 60 hz, transmission line with each line have a series impedance of
posledela

Answer:

Explanation:

Given a three-phase system

Frequency f=60Hz

Line impedance Z= 12.84 + j72.76 Ω

Then,

The resistance is R=12.84Ω

And reactance is X=72.76Ω

Z=√(12.84²+72.76²)

Z=73.88

Angle = arctan(X/R)

Angle = arctan(72.76/12.84)

Angle=80°

Then, Z=73.88 < 80° ohms

Load voltage is 132 kV

Load power P=55 MWA

Power factor =0.8lagging

the relation between the sending and receiving end specifications are given using ABCD parameters by the equations below.

Vs = AVr + BIr

Is = CVr + DIr

Where

Vs is sending Voltage

Vr is receiving Voltage

Is is sending current

Ir is receiving current

A is ratio of source voltage to received voltage A=Vs/Vr when Ir=0

B is short circuit resistance

B= Vs/Ir when Vr=0

C is ratio of source current to received voltage C=Is/Vr when Ir=0

D is ratio of source current to received current D=Is/Ir when Vr=0

Now,

The load at 55MVA at 132kV (line to line)

Therefore, load current is

Ir= P/V√3

Ir=55×10^6/(132×10^3×√3)

Ir=240.56 Amps

It has a power factor 0.8 lagging

PF=Cosθ

0.8=Cosθ

θ=arcCos(0.8)

θ=36.87°

Therefore, Ir=240.56 <-36.87°

Vr=V/√3

Vr=132/√3

Vr=76.21 kV. Phase voltage

Vr= 76210 < 0° V

For series impedance,

Using short line approximation

Vs = Vr + IrZ

Vs = 76210 < 0° + (240.56 <-36.87° × 73.88 < 80°)

Using calculator

Vs=76210<0° + 17772.5728<(-36.87°+80°)

Vs=76210<0° + 17772.5728<43.13°

Vs=89970.67<7.7°

Also

Is = Ir = 240.56 <-36.87° Amps

Therefore, the ABCD parameters is

A=Vs/Vr

A= 89970.67 <7.7° / 76210 <0°

A=1.181 <7.7-0

A=1.18 <7.7° no unit

B = Vs/Ir

B = 89970.67 < 7.7° / 240.56 <-36.87°

B = 347.01 < 7.7+36.87

B= 347.01 < 44.57° Ω

C= Is/Vr = 240.56 <-36.87° / 76210 < 0°

C= 0.003157 <-36.87-0

C= 3.157 ×10^-3 < -36.87° /Ω

C= 3.157 ×10^-3 < -36.87° Ω~¹

D= Is/Ir

Since Is=Ir

Then, D = 1 no unit.

8 0
3 years ago
A wave with a frequency of 14 Hz has a wavelength of 3 meters. At what speed will this wave travel?
kobusy [5.1K]

Answer:

42m/s

Explanation:

Frequency (f) =14Hz and wavelength (λ )=3m

Frequency and wavelength can be related to speed:

speeds(V)=f*λ=14*3=42m/s.

6 0
3 years ago
Read 2 more answers
Hot air at an average temperature of 100 degC flows through a 3 m long tube with an inside diameter of 60 mm. The temperature of
Arte-miy333 [17]

Answer:

\dot Q = 912.017\,W

Explanation:

The heat transfer rate due to convection is calculated by this formula:

\dot Q = h_{air}\cdot A_{tube, in}\cdot (T_{air} - T_{tube})

The output is determined by replacing terms:

\dot Q = (20.1\,\frac{W}{m^{2}\cdot ^{\textdegree}C})\cdot (\pi )\cdot (0.06\,m)\cdot (3\,m)\cdot (100^{\textdegree}C-20^{\textdegree}C)

\dot Q = 912.017\,W

6 0
3 years ago
Read 2 more answers
How will we achieve our goal
DanielleElmas [232]

Answer:

Take action. Try hard. Keep practicing. Explore a different way. Ask someone how to do it better. Do your best. Learn how others have done it. Build upon your strengths. Review and fix any mistakes. Don’t give up.

Hope this helped you!

Explanation:

6 0
4 years ago
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