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.
1 Brush your teeth twice a day. 2  When you brush your teeth, brush for them for two minutes. 3  You might want to try brushing once in the morning and once in the evening. 4  Use just enough toothpaste to cover the length of the brush itself.  Do not swallow toothpaste.