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.
African Americans brush 18 seconds longer than Americans as a whole, while younger adults ages 18 to 24 spend 16 seconds longer than average brushing. Nearly six of 10 Americans brush their teeth at bedtime and as soon as they wake up in the morning, while 38 percent brush after breakfast. According to the Delta Dental survey, 91 percent of Americans brush most frequently at home in their bathrooms over the sink.