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kkurt [141]
3 years ago
5

Plssssssssssssssssss help

Engineering
2 answers:
zhannawk [14.2K]3 years ago
8 0

with what love? you have no question on here and there isn't any attachments. I'd love to help but i don't know how

Anna [14]3 years ago
6 0

Answer:

with what exactly? define " please, help "

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A specimen of a 4340 steel alloy with a plane strain fracture toughness of 54.8 MPa (50 ksi ) is exposed to a stress of 2023 MPa
Neko [114]

Answer:

Explanation:

The formula for critical stress is

\sigma_c=\frac{K}{Y\sqrt{\pi a} }

\sigma_c =\texttt{critical stress}

K is the plane strain fracture toughness

Y is dimensionless parameters

We are to Determine the Critical stress

Now replacing the critical stress with 54.8

a with 0.2mm = 0.2 x 10⁻³

Y with 1

\sigma_c=\frac{54.8}{1\sqrt{\pi  \times 0.2\times10^{-3}} } \\\\=\frac{54.8}{\sqrt{6.283\times10^{-4}} } \\\\=\frac{54.8}{0.025} \\\\=2186.20Mpa

The fracture will not occur because this material can handle a stress of 2186.20Mpa  before fracture. it is obvious that is greater than 2023Mpa

Therefore, the specimen does not failure for surface crack of 0.2mm

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3 years ago
Driving alone without the distraction from passengers reduces the risks you face in driving.
vredina [299]

Driving alone without the distraction from passengers reduces the risks you face in driving.

True

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2 years ago
If 4 squares equal 1 foot, how many inches is one square?
xeze [42]

There is 3 inches in one square

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3 years ago
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I need help on what’s and input and output to make the flowchart
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What is the air change rate (ACH) for a 100 ft^2 (9.3 m^2) space with a 10 ft (3.0 m) ceiling and an airflow rate of 200 cfm (95
kakasveta [241]

Answer:

The ACH is 12/h

Solution:

As per the question:

Area of the space, A_{s} = 100 ft^{2}

Height of the given space, h = 10 ft

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Now, to find the Air Change Rate (ACH):

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Now, ACH per hour:

= \frac{60}{5} = 12/h

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4 years ago
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