Sound travels at approximately 1,500 m/s in sea water. How far will a sonar pulse travel in 90 s?

Which device uses ac current to operate?

Aregular polygon has angkes of size 150° each.how many side has the polygon

In a stagnant pool of water, a crayfish may spend much of its time lying with one side of its carapace near the surface of the water. in this position, it will move the walking legs on that side in a rhythmic back-and-forth motion. explain the likely function of this behavior.