It IS <span>PE = (1200 kg)(9.8 m/s²)(42 m) = 493,920 J </span>
They were able to find the orbit of a comet and predict the year of its return.
<span>Well, ice is NOT more compressed than water.
Ice molecules do NOT have more charge than water molecules.
Water does NOT have a lower temperature than ice.
But water molecules DO move around more easily than ice molecules</span>
The answer is “their common center of mass “
