Gravitational firce and speed,light i guess. LOL im not even sure is this is right
It indicates that Huck frequents places perhaps grocery stores where the conditions are not sanitary what with "sickly eggs and rotten cabbages and dead cats" in other words, Huck cannot afford to frequent fancier shops or fancier homes because he is poverty stricken and used to such sights.
By calming yourself or that person down
Clear-right? Hope this helps xx
If ur asking what this phrase means it means think before u act. for example think of what will happen to u after u jump off a bridge u will get hurt so don’t do it