Two Protons, Each of Charge 1

question 77

Multiple Choice

Two protons, each of charge 1.60 *10 ^{- 19} C, are 3.00 *10 ^{- 5} m apart. What is the change in potential energy if they are brought 1.00 *10 ^{- 5} m closer together? (k_e = 8.99 *10⁹ N·m²/C²)

• A) 3.84 *10 ^{- 24} J
• B) 3.20 *10 ^{- 16} J
• C) 1.15 *10 ^{- 23} J
• D) 3.20 *10 ^{- 19} J

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Definitions:

Lens

A curved piece of glass or other transparent material that focuses or disperses light rays, used in glasses and cameras.

Fovea

The central focal point in the retina of the eye, around which the cones are densely packed for high visual acuity.

Retina

A layer at the back of the eyeball containing cells that are sensitive to light and trigger nerve impulses that pass via the optic nerve to the brain, where a visual image is formed.

Thalamus

A part of the brain that acts as a principal relay station for transmitting sensory information.