Chapter 30, Problem 1P

To determine

The mass of pi meson in atomic mass unit.

Answer to Problem 1P

Solution:

$139{\text{MeV/ c}}^{\text{2}}=0.149\text{AMU}$

Explanation of Solution

Given:

Mass of pi meson:139MeV/c²

Formula used:

1 atomic mass unit =931.5MeV/ c²

Calculation:

Atomic mass unit is a standard unit for measurement of atomic mass.

$\begin{array}{l}1\text{ atomic mass unit }=931.5{\text{MeV/ c}}^{\text{2}}\\ \frac{1}{931.51{\text{ MeV/ c}}^{\text{2}}}=1{\text{MeV/ c}}^{\text{2}}\\ \frac{139}{931.51{\text{ MeV/ c}}^{\text{2}}}=139{\text{MeV/ c}}^{\text{2}}\\ 139{\text{MeV/ c}}^{\text{2}}=0.149\text{AMU}\end{array}$