The average Benchmark Human Services monthly salary ranges from approximately $1,500 per month for Licensed Practical Nurse to $1,500 per month for Licensed Practical Nurse.Salary information comes from 67 data points collected directly from employees, users, and jobs on Indeed.he average Benchmark Human Services monthly salary ranges from approximately $1,500 per month for Licensed Practical Nurse to $1,500 per month for Licensed Practical Nurse.
In a vacuum, all electromagnetic waves travel at approximately 3 x 108 m/s - the fastest speed possible. When electromagnetic waves travel through matter (for example, light through air or glass), they travel a bit slower than this but rarely less than half as fast as in a vacuum. The value for light travelling through an optical fibre, for example, is taken as 2 x 108 m/s.
How fast do waves travel? The speed of a wave-its wave speed-is related to its frequency and wavelength, according to this equation: wave speed (metre per second) = frequency (hertz) Ã wavelength (metre). For example, a wave with a frequency of 100Hz and a wavelength of 2m travels at 100 Ã 2 = 200m/s. Check your understanding of the equation by having a go at this activity. Your web browser does not have JavaScript switched on at the moment.