Answer:
Explanation:
See attachment for complete work.
1) Equivalent resistance, 1/R = 1/15 + 1/40 + 1/60 = 8+3+2 /120 = 13/120
R = 120/13 = 9.23
2) Current, I = V/R = 115/9.23 = 12.45 A
Answer:
r = 2.70 Ω
Explanation:
The voltage is given by the ratio
V = i R
In the given circuit the external resistance is placed in series, so the voltage ratio is
V = i₁ (R₁ + r)
V = i₂ (R₂ + r)
Since the battery is the same, the voltage is the same in both cases
i₁ (R₁ + r) = i₂ (R₂ + r)
r (i₁ –i₂) = i₂ R₂ - i₁ R₁
r = (i₂ R₂ –i₁ R₁) / (i₁ -i₂)
Let's calculate
r = (0.019 500 - 0.093 100) / (0.093 - 0.019)
r = 0.2 /0.074
r = 2.70 Ω
Answer:
ome acid rain occurs naturally, but sulfur dioxide and nitrogen oxide emissions from smokestacks combine with rain to make sulfuric and nitric acid in amounts that harm the environment. The region of the United States most harmed by acid rain is the East Coast, including the Appalachian Mountains and the Northeast.
Explanation:
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