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's how: 1  Brush your teeth with fluoride toothpaste after every meal or at least twice a day. Bedtime is an important time to brush. 2  Brush up and down in a circular motion. 3  Gently brush your gums as well to keep them healthy. 4  Floss your teeth once a day to remove plaque and food that's stuck between your teeth.