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dem82 [27]
3 years ago
6

1. Why is outside air mixed with return air?​

Engineering
1 answer:
Dmitrij [34]3 years ago
3 0

Answer:

Explanation:

outside air must be mixed with return air at some point in time because here is an example a warm current of air comes in contact with a cold current of air  the warm current has to cool down so it could mix with the cold current or if they don´t mix they would continue to bump into each other and probably cause a tornado. probably.

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Leland wants to work in a Production career operating heavy machinery. Which type of education or training should Leland seek?
zhenek [66]

Answer:

it is indeed C

Explanation:

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3 years ago
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A spring-loaded piston-cylinder contains 1 kg of carbon dioxide. This system is heated from 104 kPa and 25 °C to 1,068 kPa and 3
labwork [276]

Answer:

Q = -68.859 kJ

Explanation:

given details

mass co_2 = 1 kg

initial pressure P_1 = 104 kPa

Temperature T_1 = 25 Degree C = 25+ 273 K = 298 K

final pressure P_2 = 1068 kPa

Temperature T_2 = 311 Degree C = 311+ 273 K = 584 K

we know that

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c_v = 0.657 kJ/kgK

from ideal gas equation

PV =mRT

V_1 = \frac{m RT_1}{P_1}

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V_2 = \frac{m RT_2}{P_2}

     =\frac{1*0.189*584}{1068}

V_1 = 0.1033 m3

WORK DONE

W =P_{avg}*{V_2-V_1}

w = 586*(0.1033 -0.514)

W =256.76 kJ

INTERNAL ENERGY IS

\Delta U  = m *c_v*{V_2-V_1}

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\Delta U  =187.902 kJ

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7 0
3 years ago
melinda is using a rectangular brass bar in a sculpture she is creating. the brass bar has a length that is 4 more than 3 times
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Answer:

180 x 60 inches

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Explanation:

Given

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P = 480

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3W + W = 240

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W = 60 inches

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3 years ago
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What is the definition of comma
masya89 [10]
Com·ma
/ˈkämə/
NOUN
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