A wave's frequency is the number of cycles that are completed in a certain amount of time. The symbol for frequency is the lowercase f and we measure it in cycles per second, which is the same as the unit hertz. A wave with a frequency of 20 Hz completes 20 wave cycles every second.Be careful that you don't confuse frequency with period. This is a common mistake. wave is a disturbance that travels through a medium in a periodic fashion, carrying energy without transporting matter. Waves are described and measured by five wave parameters: the period, the frequency, the amplitude, the wavelength, and the speed.
Quick Answer. It takes three to five hours for the effects of novocaine and other local dental anesthetics to wear off completely, according to Jonathan G. Campbell, D.D.S. The tooth remains numb for one to two hours, while the tongue and lips remain numb for up to five hours. Continue Reading.
VictozaÂ® starts to lower blood sugar in as soon as 2 weeks, lowers A1C, and has been shown to keep it down in a 2-year medical study. It comes in a prefilled pen you use just once a day, any time, so it fits into your busy life. While not a weight-loss product, VictozaÂ® may help you lose some weight. VictozaÂ® is covered by most major health care plans and if eligible, you can pay no more than $25 on your prescription co-pay.