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VLD [36.1K]
3 years ago
6

A cylinder 8 in. in diameter and 3 ft long is concentric with a pipe of 8.25 in internal diameter. Between the cylinder and the

pipe there is an oil film. What force is required to move the cylinder along the pipe at a constant velocity of 3 ft/s? The kinematic viscosity of the oil is 0.006 ft2 /s; the SG is 0.92.
Engineering
1 answer:
yarga [219]3 years ago
5 0

Answer:

What force is requiere to move the cylinder along

Explanation:

The kinematic viscosity of the ol is 0.006 fr2

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Vending machine controller (adapted from Katz, "Contemporary Logic Design") Design and implement a finite state machine that con
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Why was information revolution different or unique <br>​
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Answer:

It made information easily accessible and ensured individuals became more vast in subject topics of interest.

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3 years ago
What is the activation energy (Q) for a vacancy formation if 10 moles of a metal have 2.3 X 10^13 vacancies at 425°C?
Yakvenalex [24]

Answer:

Activation\ Energy=2.5\times 10^{-19}\ J

Explanation:

Using the expression shown below as:

N_v=N\times e^{-\frac {Q_v}{k\times T}

Where,

N_v is the number of vacancies

N is the number of defective sites

k is Boltzmann's constant = 1.38\times 10^{-23}\ J/K

{Q_v} is the activation energy

T is the temperature

Given that:

N_v=2.3\times 10^{13}

N = 10 moles

1 mole = 6.023\times 10^{23}

So,

N = 10\times 6.023\times 10^{23}=6.023\times 10^{24}

Temperature = 425°C

The conversion of T( °C) to T(K) is shown below:

T(K) = T( °C) + 273.15  

So,  

T = (425 + 273.15) K = 698.15 K  

T = 698.15 K

Applying the values as:

2.3\times 10^{13}=6.023\times 10^{24}\times e^{-\frac {Q_v}{1.38\times 10^{-23}\times 698.15}

ln[\frac {2.3}{6.023}\times 10^{-11}]=-\frac {Q_v}{1.38\times 10^{-23}\times 698.15}

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4 0
3 years ago
List all the qualities of an engineer?
Dennis_Churaev [7]

Answer:

Math and Computer Skills. A qualified engineer should be good at math, at least through the level of calculus and trigonometry, and understand the importance of following the data when making design decisions.

Organization and Attention to Detail.  

Curiosity.  

Creativity.  

Critical Thinking.

Intuition.

Explanation:

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2 years ago
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Answer:

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8 0
3 years ago
Read 2 more answers
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