When at rest, the particle has a lifetime of 0 15 ns before it decays into a neutron and a pion One particular particle is observed to travel 3 0 cm in the lab before decaying What was its speed

Question: When at rest, the - particle has a lifetime of 0.15 ns before it decays into a neutron and a pion. One particular - particle

When at rest, the Σ- particle has a lifetime of 0.15 ns before it decays into a neutron and a pion. One particular Σ- particle is observed to travel 3.0 cm in the lab before decaying. What was its speed?

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