All stars you see with your unaided eye are

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.

What do you think car designers do if the damage caused by a crash test is too severe?

Difference between series and parallel circuits