A dolphin in 25acirc;brvbar;C sea water emits a sound directed toward the bottom of the ocean 440 m below. How much time passes before it hears an

A dolphin in 25â¦C sea water emits a sounddirected toward the bottom of the ocean 440m below.How much time passes before it hears anecho? The speed of sound in sea water is1530 m/s.Answer in units of s.