Explain why the velocity and acceleration vectors behave as they do for the preset motions (linear acceleration I, II, circular motion, & harmonic motion).
Dentist Tip: Brushing three times a day is ideal. If you can brush once after every mealâbreakfast, lunch, and dinnerâyou minimize the growth of bacteria in your mouth. But wait an hour after each meal: brushing too soon can cause damage to the enamel of your teeth.
I've read that it's not good to brush right after any meal. The acids and sugars soften the enamel, then when you brush it can wear down the enamel. So brush before breakfast or a while after. I asked my dentist about this and they said that rinsing your mouth with water after a meal clears the acid.