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Cerrena [4.2K]
3 years ago
5

Which term defines the amount of mechanical work an engine can do per unit of heat energy it uses?

Engineering
1 answer:
hammer [34]3 years ago
6 0

Answer:

d

Explanation:

is the because that's the amount of work in making machine can do producing heat

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Technician A says that rear-wheel drive vehicles usually get better traction than front-wheel drive vehicles. Technician B says
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Both a and b

Disclaimer! (90% sure)
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On highways, the far left lane is usually the _____. A. emergency lane B. merge lane C. slowest D. fastest
slamgirl [31]

On highways, the far left lane is usually the<u> fastest</u> moving traffic.

Answer: Option D.

<u>Explanation:</u>

For the most part, the right lane of a freeway is for entering and leaving the traffic stream. It is an arranging path, for use toward the start and end of your interstate run. The center paths are for through traffic, and the left path is for passing. On the off chance that you are not passing somebody, try not to be driving in the left path.

Regular practice and most law on United States expressways is that the left path is saved for passing and quicker moving traffic, and that traffic utilizing the left path must respect traffic wishing to surpass.

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3 years ago
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A tensile test is performed on a metal specimen, and it is found that a true
alexdok [17]

Answer:

600 mpa

Explanation:

It's smart for a equation then you reperfuce

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3 years ago
Two technicians are discussing cylinder- testing. Technician A says that when testing the power level of a specific cylinder usi
konstantin123 [22]

Answer:

The answer is "Both Technician A and Technician B".

Explanation:

The cylinder Testing is intended to assess locomotive inconsistency in CNS rodents, for example, whenever the animal moves within a transparent plastic tube, its preliminary activity is registered as it rises against the stadium wall.

In the given question both technicians are correct because both are reliable ways to check cylinders and the influence of the belief if every pathway has many more advantages than each other.

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3 years ago
A tubular reactor has been sized to obtain 98% conversion and to process 0.03 m^3/s. The reaction is a first-order irreversible
Zolol [24]

Answer:

The conversion in the real reactor is = 88%

Explanation:

conversion = 98% = 0.98

process rate = 0.03 m^3/s

length of reactor = 3 m

cross sectional area of reactor = 25 dm^2

pulse tracer test results on the reactor :

mean residence time ( tm) = 10 s and variance (∝2) = 65 s^2

note:  space time (t) =

t = \frac{A*L}{Vo}   Vo = flow metric flow rate , L = length of reactor , A = cross sectional area of the reactor

therefore (t) = \frac{25*3*10^{-2} }{0.03} = 25 s

since the reaction is in first order

X = 1 - e^{-kt}

e^{-kt} = 1 - X

kt = In \frac{1}{1-X}

k = In \frac{1}{1-X} / t  

X = 98% = 0.98 (conversion in PFR ) insert the value into the above equation then  

K = 0.156 s^{-1}

Calculating Da for a closed vessel

; Da = tk

      = 25 * 0.156 = 3.9

calculate Peclet number Per using this equation

0.65 = \frac{2}{Per} - \frac{2}{Per^2} ( 1 - e^{-per})

therefore

\frac{2}{Per} - \frac{2}{Per^2} (1 - e^{-per}) - 0.65 = 0

solving the Non-linear equation above( Per = 1.5 )

Attached is the Remaining part of the solution

3 0
3 years ago
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