Neco Model Questions Vol1 2018 Physics Question 42

Practice objective / multiple choice question 42 from the 2018 Neco Model Questions Vol1 Physics examination.

Neco Model Questions Vol1 2018 Physics Objective / Multiple Choice Hard Difficulty
Question 42 NECO_MODEL_QUESTIONS_VOL1 • 2018 • PHYSICS • objective

A \(2.0\) g sample of the radionuclide \(^{226}\mathrm{Ra}\) (half‑life \(1.6\times10^{3}\) yr) decays by emitting an \(\alpha\) particle of energy \(4.87\) MeV. (a) Calculate the activity of the sample in becquerels. (b) Determine the power released as heat in watts.

Answer Options

Correct Answer A. Activity = 7.3×10^10 Bq; Power ≈ 5.7×10⁻² W
B. Activity = 8.1×10^10 Bq; Power ≈ 6.9×10⁻² W
C. Activity = 7.3×10^9 Bq; Power ≈ 5.7×10⁻³ W
D. Activity = 6.5×10^10 Bq; Power ≈ 4.2×10⁻² W
Correct Answer
A
Correct Option:
Activity = 7.3×10^10 Bq; Power ≈ 5.7×10⁻² W

About This Question

This is Neco Model Questions Vol1 2018 Physics Question 42. It is one of the objective questions from the 2018 Neco Model Questions Vol1 Physics examination.

Difficulty level: Hard .

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