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An elementary particle called a pi meson (or pion for short) has an average lifetime of 2.6×10⁻⁸s when at rest. Part A If a pion moves with a speed of 0.98 c relative to Earth, find the average lifetime of the pion as measured by an observer on Earth. Express your answer using two significant figures. Δt =11.6•10⁻⁸s
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