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.
Two Minutes, Twice a Day. To brush your teeth correctly, spend at least two minutes using a recommended brushing technique, which includes 30 seconds brushing each section of your mouth (upper right, upper left, lower right and lower left), both morning and night.