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?

Asilver dollar is dropped from the top of a building that is 1324 feet tall. use the position function below for free-falling objects. s(t) = −16t2 + v0t + s0 (a) determine the position and velocity functions for the coin. s(t) = v(t) = (b) determine the average velocity on the interval [1, 2]. ft/s (c) find the instantaneous velocities when t = 1 second and t = 2 seconds. v(1) = ft/s v(2) = ft/s (d) find the time required for the coin to reach the ground level. (round your answer to three decimal places.) t = s (e) find the velocity of the coin at impact. (round your answer to three decimal places.) ft/s