An isotope with a half-life of 15.0 seconds was produced as a byproduct of a nuclear a
reaction experiment. How many half-lives pass after exactly 60.0 seconds have elapsed?
Enter only a number

Dogs make wonderful pets because they us stay happy and healthy. the topic sentence is "dogs make wonderful pets." , is this correct? i keep doubting myself.

If this were a fictionalized account, instead of a memoir, which might be the opening sentence? a) i am not your prisoner. b) i find myself in prison. c) you have taken me prisoner. d) black hawk had been taken prisoner.

This excerpt is from the poet by alfred lord tennyson the poem describes a poets consciousness and perception which three lines suggests the richness of a poets thoughts