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.
There are toothbrushes with timers that tell you how long to brush. These types of toothbrushes may help you when brushing different angles of teeth in your mouth. Wait 10 minutes before brushing after eating a meal.