Potential Energy of Point-Charges: an Electron Is Released from Rest

question 4

Multiple Choice

Potential energy of point-charges: An electron is released from rest at a distance of 9.00 cm from a proton. If the proton is held in place, how fast will the electron be moving when it is 3.00 cm from the proton? (m_el = 9.11 × 10^-31 kg, e = 1.60 × 10^-19 C, k = 1/4πε₀ = 8.99 × 10⁹ N ∙ m²/C²)

• 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:

Pain

A distressing physical and emotional sensation linked to real or possible harm to the body, or expressed through the lens of such harm.

Rubber-Hand Illusion

A psychological experiment that demonstrates how sensory and visual cues can lead to a false perception of body ownership.

Sensory Interaction

The process by which multiple senses, such as sight and sound, work together to give a more comprehensive understanding of the environment.

Kinesthesis

refers to the sense that detects body position, movement, and balance, primarily through receptors in the muscles and joints.