2 years ago

Which explanation best summarizes what went wrong during Paul’s cost analysis?

Engineering

1 answer:

Valentin [98]2 years ago

4 0

Answer:

wut is it

Explanation:

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Dampers dampers springs are used inside some valve spring to

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The correct answer is A. Retain. Valve Stem seals

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3 years ago

Show the ERD with relational notation with crowfoot. Your ERD must show PK, FKs, min and max cardinality, and correct line types

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Answer

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Step-by-step explanation:

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4 years ago

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3 years ago

Which of the following is NOT true about hydraulic systems?

Dmitry [639]

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D.In hydraulic systems, the operating temperatures must be kept between 170�F and 180°F

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3 years ago

A 30 mm thick AISI 1020 steel plate is sandwiched between two 10 mm thick 2024-T3 aluminum plates and compressed with a bolt and

denis-greek [22]

Answer:

275 MPa

Explanation:

Regardless of what it is holding, the stiffness of a bolt depends on its own material properties and geometry.

The stiffness is:

$k = E * \frac{A}{l}$

I assume this one is made of steel, because regular bolts are steel.

The Young's modulus for steel is E = 210 GPa

The longitude is given. (But note that in a real application you have to consider the length up to the nut.)

The section is (using the nominal diameter of 10 mm)

$A = \frac{\pi * d^2}{4} = \frac{\pi * 0.01^2}{4} = 7.85e-5 m^2$

Then:

$k = 2.1e11 * \frac{7.85e-5}{0.06} = 275e6 Pa = 275 MPa$

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3 years ago