2 years ago

Which of the following statements about PAC storage and housekeeping is correct? (Welding)

Engineering

1 answer:

elena-s [515]2 years ago

7 0

The answer would be C.the compressed air line is normally left connected

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a = 1.68m/ $S^{2}$

Explanation:

Please kindly find the attached file for explanations

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3 years ago

What is the purpose of gears?

Brrunno [24]

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To help wheels move in a circle

Explanation:

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2 years ago

For some transformation having kinetics that obey the Avrami equation, the parameter n is known to have a value of 1.7. If, afte

luda_lava [24]

Answer:

It would take approximately 305 s to go to 99% completion

Explanation:

Given that:

y = 50% = 0.5

n = 1.7

t = 100 s

We need to first find the parameter k from the equation below.

$exp(-kt^n)=1-y$

taking the natural logarithm of both sides:

$-kt^n=ln(1-y)\\kt^n=-ln(1-y)\\k=-\frac{ln(1-y)}{t^n}$

Substituting values:

$k=-\frac{ln(1-y)}{t^n}= -\frac{ln(1-0.5)}{100^1.7} = 2.76*10^{-4}$

Also

$t^n=-\frac{ln(1-y)}{k}\\t=\sqrt[n]{-\frac{ln(1-y)}{k}}$

Substituting values and y = 99% = 0.99

$t=\sqrt[n]{-\frac{ln(1-y)}{k}}=\sqrt[1.7]{-\frac{ln(1-0.99)}{2.76*10^{-4}}}=304.6s$

∴ t ≅ 305 s

It would take approximately 305 s to go to 99% completion

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2 years ago

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What phenomenon allows water to reach the top of a building?

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Option C: water pressure.

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Water pressure allows water to reach the top of a building.

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I thinks it’s a A.True

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3 years ago