How Much Energy Is Transported Across A $1.00 - \mathrm { cm } ^ { 2 }$

question 24

Multiple Choice

How much energy is transported across a $1.00 - \mathrm { cm } ^ { 2 }$ area per hour by a sinusoidal electromagnetic wave whose electric field has a maximum strength of $30.4 \mathrm {~V} / \mathrm { m }$ ? $\left( \varepsilon _ { 0 } = 8.85 \times 10 ^ { - 12 } \mathrm { C } 2 / \mathrm { N } \cdot \mathrm { m } ^ { 2 } , \mu _ { 0 } = \right.$ $\left. 4 \pi \times 10 ^ { - 7 } \mathrm {~T} \cdot \mathrm { m } / \mathrm { A } , c = 3.0 \times 10 ^ { 8 } \mathrm {~m} / \mathrm { s } \right)$

• A) \(0.44 \mathrm {~J}\)
• B) \(0.44 \mu \mathrm { J }\)
• C) \(0.44 \mathrm {~mJ}\)
• D) \(0.44 \mathrm {~nJ}\)

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Definitions:

Labor Supply

The total hours that workers are willing and able to work in a given period, often influenced by factors like wages, working conditions, and social norms.

Capital

Financial assets or the financial value of assets, such as cash and goods, used to generate wealth through investment or production.

Factor Substitution Effect

The process by which firms replace factors of production (like labor and capital) with others due to changes in relative prices or technology.

Productivity

A measure of the efficiency of production, often expressed as the ratio of outputs to inputs in the production process.