Api meson, or pion, is an elementary particle that exists for a brief time. charged pions at rest have an average lifetime of 26.0 ns. a group of freshly created pions travel, each at a constant speed, an average distance of 28.0 m in the laboratory before decaying. what was the average pion speed as measured in the lab?
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Api meson, or pion, is an elementary particle that exists for a brief time. charged pions at rest ha...
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