Which statement is true about the loudness of sound?

Aforce of 240.0 n causes an object to accelerate at 3.2 m/s2. what is the mass of the object?

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.

Anybody wanna ? (picture included? )