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fomenos
2 years ago
9

5. Which of these materials in a shop contain metals and toxins and can pollute the environment? A) Antifreeze B) Solvents C) Ba

tteries D) All of the above
I say it's D) All of the above​
Engineering
2 answers:
11Alexandr11 [23.1K]2 years ago
6 0
The answer is D All of above
Because all contain metals and toxic and can pollute environment
Elza [17]2 years ago
3 0
As a multiple choice the only correct answer is D
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A pipe of 0.3 m outer diameter at a temperature of 160°C is insulated with a material having a thermal conductivity of k = 0.055
Alekssandra [29.7K]

Answer:

Q=0.95 W/m

Explanation:

Given that

Outer diameter = 0.3 m

Thermal conductivity of material

K= 0.055(1+2.8\times 10^{-3}T)\frac{W}{mK}

So the mean conductivity

K_m=0.055\left ( 1+2.8\times 10^{-3}T_m \right )

T_m=\dfrac{160+273+40+273}{2}

T_m=373 K

K_m=0.055\left ( 1+2.8\times 10^{-3}\times 373 \right )

K_m=0.112 \frac{W}{mK}

So heat conduction through cylinder

Q=kA\dfrac{\Delta T}{L}

Q=0.112\times \pi \times 0.15^2\times 120

Q=0.95 W/m

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2 years ago
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Leno4ka [110]
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Where are revolved sections placed in a print? A) in between break lines B) cutting planes are used to identify their locations
Svetach [21]

Answer:

B. Cutting planes are used to identify their locations.

Explanation:

Revolved view is a cross section view of revolved 90 degrees around a cutting plane projections. The revolved view of print will differ from a cross sectional view. It includes a line nothing the axis of revolution for the view. The correct answer is B. The revolved section in the prints has cutting planes that will be used to identify their location.

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2 years ago
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Answer:

what are the choices for the answer not ABC

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In a cellular phone system, a mobile phone must be paged to receive a phone call. However, paging attempts don’t always succeed
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Answer:

The correct response will be "0.992". The further explanation to the following question is given below.

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The probability that paging would be beneficial becomes 0.8  

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⇒  0.2\times 0.8

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On the third attempt the success probability will be:

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