A proton,which has a mass of 1.67 × 10^-27, is moving at 0.80c relative to the laboratory.What does a physicist in that lab measure for its momentum? (c = 3.0 × 10⁸ m/s) A)4.0 × 10^-19 kg ∙ m/s B)4.4 × 10^-19 kg ∙ m/s C)5.0 × 10^-19 kg ∙ m/s D)5.8 × 10^-19 kg ∙ m/s E)6.7 × 10^-19 kg ∙ m/s

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Quizplus · Accepted Answer

The relativistic momentum is calculated using p = γmv, where γ = 1/√(1-v²/c²). For v = 0.80c, γ ≈ 1.67. Thus, p ≈ 1.67 × 1.67 × 10^-27 kg × 0.80 × 3.0 × 10^8 m/s ≈ 6.7 × 10^-19 kg ∙ m/s.

A Proton,which Has a Mass of 1