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CAIE A-Level Physics AS 11.1.12 The Unified Atomic Mass Unit U As a Unit of Mass Questions

Use the unified atomic mass unit to express nuclear and particle masses and convert accurately between mass and energy units.

Syllabus
2028–2030
Course
Physics 9702
Level
AS

Exam points

  • Understand the unified atomic mass unit u as a mass scale for nuclei and particles.
  • Convert between unified atomic mass units, kilograms and energy units in nuclear calculations.

CAIE A-Level Physics AS 11.1.12 The Unified Atomic Mass Unit U As a Unit of Mass Questions question 1

[Maximum number: 1]

The discovery of a particle with an unusual charge was an important step in the development of the theory of quarks. The particle is a hadron with a mass of 2.19×10−27 kg2.19 \times 10^{-27} \mathrm{~kg} and a charge of +2 e, where e is the elementary charge.

Calculate the mass, in u, of the particle. Give your answer to three significant figures.
mass = u

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