1. A swing is a resonant example of a simple system that most people have practical experience with .
2. A swing set is a simple example of a resonant system with which most people have practical experience .

no

1. Although its conjugate acid is highly reactive , peroxynitrite is basic in stable solutions .
2. Although its conjugatic acid is highly reactive , peroxynitrite is basic in stable solutions .

yes

1. It was first described by Wolfgang Killian in 1977 and further researched by Maria Teschler-Nicola and Philip Pallister in 1981 .
2. It was first described by Wolfgang Killian in 1977 and further researched in 1981 by Maria Teschler - Nicola and Philip Pallister .
yes