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.
Most dentists recommend that you brush at least twice a day -- once in the morning and once before bed. If you can fit in a third time somewhere in the middle, even better! Try brushing at a 45Â° angle as this helps remove plaque and food/drink particles on your teeth better than if you did it normally.