Carbon-14 (4c), which has a half-life of approximately 5,730 years, decays into nitrogen-14 (14N). The following data table shows how the amount of 14C in a certain plant changes over time. How long will the
plant have been dead after 2 half-lives have passed?

The record distance in the sport of throwing cowpats is 81.1 m. this record toss was set by steve urner of the united states in 1981. assuming the initial launch angle was 45° and neglecting air resistance, answer the following. (a) determine the initial speed of the projectile. m/s