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Chapter 39, Problem 43AP
To determine

The fractional uncertainty in the mass determination of π0 meson.

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A π0 meson is an unstable particle produced in high-energy particle collisions. Its rest energy is approximately 135 MeV, and it exists for a lifetime of only 8.70 × 10-17 s before decaying into two gamma rays. Using the uncertainty principle, estimate the fractional uncertainty Δm/m in its mass determination.
Pls help ASAP.
Calculate the speeds of the electrons from a 1 kV electron gun and from a 1 MV electron gun. The mass of the electron is 0.511 MeV or 9.109 * 10 ^ - 31 * kg
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