Electromagnets are not used for what?* O to power car windows
O computer hard drive
door bells
opening a key lock

Ineed with a, b, c, d, and e on the long answer

How manyatoms of mercury are in 1.4214e+1 ml sample

An electron moved from shell n = 2 to shell n = 1. what most likely happened during the transition? a fraction of a photon was added. a photon of energy was absorbed. a fraction of a photon was removed. a photon of energy was released.