We can calculate the wavelength of sound waves that we can hear using the formula wavelength = velocity / frequency. In air sound travels at about 340 meters per second (the precise value depends on temperature, humidity, and pressure).
The average salary for certified nursing assistant jobs in Raleigh, NC is $37,000. Average certified nursing assistant salaries can vary greatly due to company, location, industry, experience and benefits.
Licensed Practical Nurses (LPN) in North Carolina earn an average of $19.09/hr and a yearly income of $39,710. Nurses working in metropolitan areas tend to earn higher salaries than in non-metropolitan parts of the state, although there is likely to be a relatively higher cost of living in those areas.