An Electron Is Released from Rest at a Distance of 9.00

question 13

Multiple Choice

An electron is released from rest at a distance of 9.00 cm from a fixed proton. How fast will the electron be moving when it is 3.00 cm from the proton? (k = 1/4πε₀ = 8.99 × 10⁹ N ∙ m²/C², e = 1.60 × 10^-19 C, m_electron = 9.11 × 10^-31 kg, m_proton = 1.67 × 10^-27 kg)

• A) 75.0 m/s
• B) 106 m/s
• C) 130 m/s
• D) 1.06 × 10³ m/s
• E) 4.64 × 10⁵ m/s

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Definitions:

Short Run

A period in which at least one factor of production is fixed, affecting the ability of a business to increase output in response to increased demand.

Marginal Cost Curve

A graphical representation showing how the cost to produce one additional unit of a good changes as production increases.

Average Total Cost (ATC)

The total cost of production (fixed and variable costs) divided by the total quantity of output produced.

Marginal Cost (MC)

Marginal cost is the increase in total cost that arises from producing one additional unit of a product or service.