An estimated 100 people are killed each year by rip currents, which drag swimmers away from shore Rachel DeSantis is a senior writer on the music team at PEOPLE. She has been working at PEOPLE since ...

Rip currents can sweep away even the strongest swimmers. Rescues can quickly turn to tragedy when a rescuer gets caught in the current.

Alternating current (ac) or direct current (dc) circuits are capable of carrying very different currents, as illustrated by the ratings on the switch in Figure 1. This is why it’s so important ...