PLEASE HELP. I don't know this material and it's freaking me out. I have to find out the lag time for the first 8 waves.

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.

A40.0 l tank of ammonia has a pressure of 12.7 kpa. calculate the. volume of the ammonia if it’s pressure is changed to 8.4 kpa while its temperature remains constant.

What is the force that opposes motion and works against the downward pull? a) friction b) gravity c) weight d) acceleration