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Blababa [14]
2 years ago
5

Which of the following might a cement mason or concrete finisher be responsible for? (Select all that apply).

Engineering
1 answer:
Salsk061 [2.6K]2 years ago
5 0
All of them except the last one. And I’m a concrete mason myself I’m best at finishing
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A number 12 copper wire has a diameter of 2.053 mm. Calculate the resistance of a 37.0 m long piece of such wire.
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Explanation:

Resistivity(R) of copper wire at 20 degrees Celsius is 1.72x10^-8Ωm.

Coil length(L) of the wire=37.0m

Cross-sectional area of the conductor or wire (A) = πr^2

A= π * (2.053/1000)/2=3.31*10^-6

To calculate for the resistance (R):

R=ρ*L/A

R=(1.72*10^8)*(37.0)/(3.31*10^-6)

R=1922.65Ω

Approximately, R=1923Ω

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