Uncertainty Principle Questions!!PLease HELP! 1. The problem statement, all variables and given/known data 1. Since a charged pi meson at rest exists on average for only 26 ns, its energy cannot be measured with unlimited precision. Determine the minimum uncertainty in the meson's rest energy. 2. Determine the minimum uncertainty in energy of an atomic state if the state lasts for .10 us? 2. Relevant equations delta(E) *delta(t) = h/2pi 3. The attempt at a solution 1. answer is 2x10^-27J..but I don't know how to get this answer. 2. answer is 5.3 x10^-28J..I don't know how to get this answer using the equation above. I used h=6.63 x10^-34...but didn't get the right answers.. Please help!