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svlad2 [7]
3 years ago
8

What is the biggest expectation when engineers test out designs?

Engineering
1 answer:
Makovka662 [10]3 years ago
4 0

Answer:

The biggest expectation of an engineer when he tests out a new design is that he expects the product to not fail, and all the stress and strains does not exceed the failure criteria.

Explanation:

In engineering design, failure of materials is considered, and the designed is usually designed to not reach or exceed the failure region of its stress strain relationship. This is why factor of safety is usually determined for each material, and it serves as a guideline for the designing of new designs. This factor of safety is the value, below which the material properties is able to cope with design stress and strain, and above which failure is likely to occur.

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One kilogram of water fills a 150 L rigid container at an initial pressure of 2MPa. The container is cooled to 40 oC. Find the i
Tatiana [17]

Answer:

The initial temperature is 649 K (376 °C).

The final pressure is 0.965 MPa

Explanation:

From the ideal gas equation

PV = nRT

P is the initial pressure of water = 2 MPa = 2×10^6 Pa

V is intial volume = 150 L = 150/1000 = 0.15 m^3

n is the number of moles of water in the container = mass/MW = 1000 g/18 g/mol = 55.6 mol

R is gas constant = 8.314 m^3.Pa/mol.K

T (initial temperature) = PV/nR = (2×10^6 × 0.15)/(55.6 × 8.314) = 649 K = 649 - 273 = 376 °C

From pressure law,

P1/T1 = P2/T2

P2 (final pressure) = P1T2/T1

T2 (final temperature) = 40 °C = 40 + 273 = 313 K

P1 (initial pressure) = 2 MPa

T1 (initial temperature) = 649 K

P2 = 2 × 313/649 = 0.965 MPa

5 0
4 years ago
Read 2 more answers
Comparison of copper and aluminium conductors looking at their properties
Alexeev081 [22]

Answer:

The density of the copper is higher than aluminium. Hence it is heavier compared to aluminium conductors it requires strong structures and hardware to bear the weight. More ductile and has high tensile strength.

...

Aluminium & Copper properties.

Property Copper (Cu) Aluminium (Al)

Density (g/cm3) 8.96 2.70

7 0
3 years ago
Your task is to design and build an apparatus that replicates the lower arm and biceps muscle system. The equipment used are a B
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Answer:

Check the explanation

Explanation:

Kindly check the attached images below to see the diagram design to solve the above question.

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4 years ago
5.<br> Which of the following is considered ideal conditions?
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Answer:

umm what

Explanation:

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3 years ago
The temperature at which all molecular motion stops is known as: a) Absolute temperature b) molecular temperature c) absolute ze
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Answer:

c) absolute zero

Explanation:

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