38. An unstable elementary particle called the eta meson has a rest mass of 549 Met and a mean fettme of 7.00 x 10"s What is the uncertainty in its rest mass?
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![38. An unstable elementary particle called the eta meson has a rest
mass of 549 Me and a mean lifettme of 7.00 x 10-"s.
What is the uncertainty in its rest mass?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F357d8c97-24a0-4cd3-bb47-fd43576a5174%2Fd74cf569-4eda-4703-b2a2-e11dd457ccb3%2Fzn55drf_processed.jpeg&w=3840&q=75)
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