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PolarNik [594]
3 years ago
11

8. When supplying heated air for a building, one often chooses to mix in some fresh outside air with air that has been heated fr

om the building as it passes through the furnace. An insulated mixing chamber is used to combine two streams of air to be used in a building. One stream of air, brought from the outside, enters at 2 kg/s, at a pressure of 120 kPa, and a temperature of 5oC. The second stream of air, coming from the building’s furnace, has a mass flow rate of 8 kg/s, a pressure of 120 kPa, and a temperature of 35oC. The combined stream is then delivered to the warm space at 120 kPa. Determine the rate of entropy generation for this mixing chamber.

Engineering
1 answer:
Afina-wow [57]3 years ago
5 0

Answer:

Check the explanation

Explanation:

Kindly check the attached images below to see the step by step explanation to the question above.

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A soil specimen was tested to have a moisture content of 32%, a void ratio of 0.95, and a specific gravity of soil solids of 2.7
belka [17]

Answer:

a. 0.9263

b. 0.4872

c. 13.83kN/m^{3}

Explanation:

moisture content (ω) = 0.32

void ratio (e) = 0.95

specific gravity (G_{s}) = 2.75

the degree of satruation (S) = \frac{w . G_{s} }{e} =0.32×2.75/0.95 = 0.9263

b. porosity (n) = \frac{e}{e + 1} = 0.95/(0.95 + 1)= 0.4872

c. dry unit weight (γ_{d}) = \frac{G_{s} . V_{w} }{1 + e}

taking specific unit weight of water (V_{w})= 9.81kN/m^{3}

γ_{d} = 2.75 × 1000/(1 + 0.95) = 13.83kN/m^{3}

5 0
3 years ago
Your boss asks you to classify some of the components in a temperature measurement system. The system consists of a thermocouple
lianna [129]

Answer:

Explanation:

1) Resolution and uncertainty of both ADC ranges

a) Resolution (for +/- 5 mV range) = 5 mV / 2n where n = number of bits of ADC

Resolution = 5 mV / 28 = 5 mV / 256 = 0.0195 mV    ..................1

uncertainty (for +/- 5 mV range) = +/- 0.5*resolution = +/- 0.5*0.0195 mV = 0.00975 mV       ..........2

b) Resolution (for +/- 5 V range) = 5 V / 2n where n = number of bits of ADC

Resolution = 5 mV / 28 = 5 V / 256 = 0.0195 V = 19.5 mV    ..................3

uncertainty (for +/- 5 mV range) = +/- 0.5*resolution = +/- 0.5*19.5 mV = 9.75 mV       ..........4

2)Thermocouple sensitivity = ( Maximum output voltage - Minimum Output voltage) / (Maximum Temperature - Minimum Temperature)

Thermocouple sensitivity = (3.649mv - 0 ) / (70 - 0) = 0.0521 mV / Deg.C           ............5

This is the required Thermocouple sensitivity

3) Water bath temperature is given as 57 deg.C

Hence voltage read by Thermocouple = Sensitivity*57 = 0.0521*57 mV = 2.9697 mV    ........6

4)We need to use ADC with a range of +/- 5 mV range as ADC with +/- 5 V range can not do measurement as it's resolution is higher than output voltage.

ADC will measure voltage as 2.9695 mV                    ......................7

8 0
3 years ago
List the parts of a manual transmission <br><br> List the parts of a typical clutch assembly?
True [87]

Answer:

Explanation: Clutch Plate.

Clutch Cover.

Clutch Bearing (Release bearing)

Release Fork (clutch fork)

7 0
3 years ago
The post is made of Douglas fir and has a diameter of 100 mm. if it is subjected to the load of20 kN and the soil provides a fri
Solnce55 [7]

Answer:

Explanation:

Kindly go through the attachment for the step by step approach to the solution of this question.

5 0
3 years ago
Can anyone tell me what rock this is?
Oksi-84 [34.3K]

Answer: answer is B

Explanation:

8 0
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