An Electron Inside a Hydrogen Atom Is Confined to Within $0.12 \mathrm {~nm}$

question 46

Multiple Choice

An electron inside a hydrogen atom is confined to within a space of about $0.12 \mathrm {~nm}$ . What is the uncertainty in this electron's speed? (melectron $= 9.11 \times 10 ^ { - 31 } \mathrm {~kg} , h = 6.626 \times 10 ^ { - 34 } \mathrm {~J} \cdot \mathrm { s }$ )

• A) \(4.8 \times 106 \mathrm {~m} / \mathrm { s }\)
• B) \(3.1 \times 10 ^ { 5 } \mathrm {~m} / \mathrm { s }\)
• C) \(3.1 \mathrm {~km} / \mathrm { s }\)
• D) \(9.6 \times 10 ^ { 5 } \mathrm {~m} / \mathrm { s }\)
• E) \(4.8 \mathrm {~m} / \mathrm { s }\)

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Definitions:

Clean Air Act

A comprehensive federal law in the United States that regulates air emissions from stationary and mobile sources to protect public health and the environment.

Stationary Sources

Fixed sites or facilities that emit pollutants into the air, such as power plants, manufacturing facilities, and refineries.

Emission Reduction

The process of lessening the quantity of pollutants released into the atmosphere, often to combat environmental issues like climate change.

NPDES

National Pollutant Discharge Elimination System, a regulatory program in the United States that issues permits for the discharge of pollutants into waters of the United States.