The decay of the neutron is associated with a quark transformation in which a down quark is converted to an up by the weak interaction . The average lifetime of 10.3 min/0.693 = 14.9 minutes is surprisingly long for a particle decay that yields 1.29 MeV of energy.
The Stella Cherry Tree is a small self pollinating tree which produces an abundance of heart shaped, shiny, black red fruit with red flesh. It can live up to 35 years on a compact 15 foot tree.
She found that the average life expectancy of a street tree is 19 to 28 years, based on typical annual mortality of 3.5-5.1%. This sounds OK initially (especially compared to 7!), but just a few trees living to old age â which are often outliers â can dramatically skew this number.