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N76 [4]
3 years ago
7

Joe is a chemical engineer whose plant discharges heavy metals into the local river. By the test authorized by the city governme

nt, the amount of heavy metals is under the legal limit imposed by the city. By a new and more accurate test, the discharge is above the legal limit, that is, the discharge is in violation of environmental rules. Joe argues with his manager that the plant should reduce its discharges to comply with the newer and more accurate test.
The case contains a conceptual issue insofar as:


A.the issue is whether present emission rates constitute a violation of city regulations.


B.the issue is what is meant by “violation.”


C.the issue is how Joe should balance his obligations to his employer against his obligations to city residents.


D.the issue is whether the heavy metals presently emitted by the plant pose a threat to the health of the community.
Engineering
1 answer:
chubhunter [2.5K]3 years ago
5 0

Answer:

B probably

Explanation:

Because the prompt doesn't specify what sort of violation it could be anything maybe when they release the metals during the day and so on.

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The objective of a properly proportioned concrete mix are: a.__________________________________________________________ b.______
sukhopar [10]

Answer:

The objective of a properly proportioned concrete mix are:

  • To produce the combination of cementitious material, water, and aggregate that meets the requirements of a particular structure, portion of a structure, or series of structures at least cost.
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Cheers!

4 0
3 years ago
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If copper (which has a melting point of 1085°C) homogeneously nucleates at 849°C, calculate the critical radius given values of
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Answer:

The critical radius is -1.30 nm

Explanation:

Temperature for homogenous nucleation of copper, T_{H} = 849^{0} C = 849 + 273 = 1122 K

Melting point of copper, T_{cu} = 1085^{0} C = 1085 + 273 = 1358 K

Latent heat of fusion, H_{f} = -1.77 * 10^{9} J/m^{3}

Surface free energy, \gamma = 0.200 J/m^{2}

Critical radius, r = ?

The formula for the critical radius is given by:

r = \frac{2 \gamma T_{cu} }{H_{f}(T_{cu} - T_{H})  }

r = \frac{2 * 0.2*1358 }{(-1.77 * 10^{9}) (1358 - 1122)  }

r = \frac{543.2 }{(-1.77 * 10^{9}) 236}\\r = -1.30 * 10^{-9} m\\r = -1.30 nm

The critical radius is -1.30 nm

8 0
4 years ago
An incremental encoder is rotating at 15 rpm. On the wheel there are 40 holes. How many degrees of rotation would 1 pulse be?
elena-s [515]

Answer:

1 pulse rotate = 9 degree

Explanation:

given data

incremental encoder rotating = 15 rpm

wheel holes = 40

solution

we get here first 1 revolution time

as 15 revolution take = 60 second

so 1 revolution take = \frac{60}{15}

1 revolution take = 4 seconds

and

40 pulse are there for 1 revolution

40 pulse for 360 degree

so 1 pulse rotate is = \frac{360}{40}

1 pulse rotate = 9 degree

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