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Deffense [45]
3 years ago
10

Use the overall heat-transfer resistance presented by the external air and the glass itself to determine the heat flux in W/m2 i

f the internal glass surface is maintained at the dew point.
Engineering
1 answer:
VLD [36.1K]3 years ago
8 0

Answer:

It does

Explanation:

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2. A thin vertical panel L = 3 m high and w = 1.5 m wide is thermally insulated on one side and exposed to a solar radiation flu
n200080 [17]

Answer: 383.22K

Explanation:

L = 3m, w = 1.5m

Area A = 3 x 1.5 = 4.5m2

Q' = 750W/m2 (heat from sun) ,

& = 0.87

Q = &Q' = 0. 87x750 = 652.5W/m2

E = QA = 652.5 x 4.5 = 2936.25W

T(sur) = 300K, T(panel) = ?

Using E = §€A(T^4(panel) - T^4(sur))

§ = Stefan constant = 5.7x10^-8

€ = emmisivity = 0.85

2936.25 = 5.7x10^-8 x 0.85 x 4.5 x (T^4(panel) - 300^4)

T(panel) = 383.22K

See image for further details.

5 0
3 years ago
A rapid sand filter has a loading rate of 8.00 m/h, surface dimensions of 10 m ´ 8 m, an effective filtration rate of 7.70 m/h.
galben [10]

Answer:

Explanation:

given data

loading rate = 8.00 m/h

filtration rate = 7.70 m/h

dimensions = 10 m × 8 m

filter cycle duration = 52 h

time = 20 min

to find out

flow rate  and  volume of water is used for back washing plus rinsing the filter  

solution  

we consider here production efficiency is 96%

so here flow rate will be  

flow rate = area × rate of filtration  

flow rate = 10 × 8 × 7.7  

flow rate = 616 m³/h

and  

we know back washing generally 3 to 5 % of total volume of water per cycle so  

volume of water is = 616 × 52

volume of water is  32032 m³

and  

volume of water of back washing is = 4% of 32032  

volume of water of back washing is 1281.2 m³

8 0
3 years ago
Which of the following is an example of a science occupation that studies non-living systems?
slava [35]

Answer:

Physical Scientists

Explanation:

Physical science is the study of the inorganic world. That is, it does not study living things. ... The four main branches of physical science are astronomy, physics, chemistry, and the Earth sciences, which include meteorology and geology.

6 0
3 years ago
What is often the first step in the formation of a volcano?
Rasek [7]

Answer:

mantle rocks begin to melt

Explanation:

melt when temperature raises, pressure lowers or water is added

3 0
3 years ago
Difference between romanesque and gothic architecture.
Montano1993 [528]

Answer:

The main difference is that Romanesque buildings will include round arches and blunt towers while gothic will have pointed towers

----- ----- ----- ----- ----- ----- ----- ----- -----

~Romanesque has:

- separate compartments

- rounded arches

- small windows.

~Gothic is:

- one piece

- has pointed arches

- large windows

Hope this Helps!

7 0
2 years ago
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