An Electron and a Positron (Antielectron), Both Nearly at Rest

question 23

Multiple Choice

An electron and a positron (antielectron) , both nearly at rest, collide. What particle(s) is(are) produced?

• A) One photon of energy 1.02 MeV
• B) Two photons of energy 511 keV
• C) A pi-meson
• D) A K-meson and an anti-neutrino

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Definitions:

Depreciable Assets

Assets whose cost is allocated over their useful lives through depreciation, typically tangible assets like machinery, buildings, and equipment.

Amortization

The process of gradually writing off the initial cost of an intangible asset over its useful life.

Amortization Expense

The method of incrementally expensing the original value of an intangible asset throughout its period of utility.

Straight-Line Amortization

A method of gradually writing off the nominal value of an intangible asset over its useful life in equal installments.