QCEVault

Special relativity — Question 268

Original QCE Vault practice · 3 marks

Q268 · Practice questionComplex familiar3 marks

QUESTION 268 (3 marks)

An unstable particle has mean proper lifetime 1.80 μs1.80\,\mu\mathrm s. A laboratory measures its mean lifetime as 3.00 μs3.00\,\mu\mathrm s. The particle speed is constant. Use c=3.00×108 m s−1c=3.00\times10^8\,\mathrm{m\,s^{-1}}.
a)
Determine the particle speed as a fraction of c and its mean laboratory travel distance.
[3 marks]
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