Beryllium, magnesium and calcium all are located in the alkaline earth group. which of these characteristics do these elements have in common?

What is hidden during a lunar eclipse? isn't the moon hidden?

Matt is driving down 7th street. he drives 150 meters in 18 sec. assuming he doesn’t slow down or speed up, what is his speed?

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.