Apositively charged rod is brought near one end of an uncharged metal bar. the end of the metal bar farthest from the charged rod will be charged

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.