Answer: (C) 9.14 . 10⁻³ Ω
Explanation:
The resistance of a resistor, is proportional to his length and inversely proportional to his area, being the proportionality constant a property of the material, called resistivity.
The resistivity is defined as the inverse of the electrical conductivity, which depends on the number of charge carriers and the mobility of these carriers, which is different for each material.
So, we can calculate the resistance as follows:
R = 1/σ . L / A, where:
σ = electrical conductivity, l= length of the wire , A = wire cross-section (assumed circular).
Replacing by the values, we can calculate R as follows:
R = 1/6.1. 10⁷ (Ω.m) . 8.1 m. / π (0.0043)² m / 4 = 9.14 . 10⁻³ Ω
Answer:
4.8 years
Explanation:
The rate of corrosion (CPR) is defined as the rate at which a metal corrodes in a specific environment. It depends on the environmental condition and the type of metal. It is expressed in inches per year or melts per year. CPR is given by:
Where K is a constant = 534, W is the weight corroded = 2.1 kg = 2.1 × 10⁶mg, A is the area = 17 in², ρ is the density = 7.9 g/cm³
From the CPR equation:
Answer:
Concentration of A:
Concentration of B:
Concentration of C:
the image shows the graphs of the three concentrations
Explanation:
We have the reaction:
A ------->k1--------->B------------->k2--------->C
Each reaction:
Where Cn is the concentration of each specie (A,B,C)
The mass balance for A:
Where x=CAo and y=CA
The mass balance for B:
The mass balance for C:
The maximum concentration of C is:
and the maximum time is: