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:

Average Total Cost

The total cost of production divided by the number of units produced, including both fixed and variable costs.

Long-Run Equilibrium

A state in which all factors of production and outputs in an economy are fully adjusted so that economic inputs meet outputs in a sustainable way, leading to no excess demand or supply.

Monopolistic Competition

Monopolistic competition is a market structure characterized by many producers selling products that are similar but not identical, allowing for some degree of market power and product differentiation.

Economic Inefficiencies

Situations where resources are not used optimally according to consumer preferences, often leading to wasted resources or unmet demands.