When molecules stick together in liquid water it is because the atoms are beginning to slw down and stop so then the moleclues start to stick together in the liquid water causing the moleclues to create a sticky texture.
The answer is: waterfalls can usually be found wherever there is lots of erosion or where there is steepness in the river's channel.
The tax to $2.99 would be the extra 1 cent you would have to pay so that it would become $3.00. Additional tax may be added like 6 cent or something but that only depends on the store or place you go to.
