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.
Here are the steps and techniques we recommend when brushing with a regular toothbrush: 1  Brush at least twice a day, but preferably after every meal. 2  First, rinse with mouthwash such as Listerine. 3  Make sure you have a relatively new toothbrush (not an old and worn out one)  Work sections of your mouth at a time.