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.
In free space the propagation speed of radio waves is the same as that of light, at approximately 300,000 km, so they would arrive there in about 1.3 seconds. The speed falls slightly when passing through a conductor such as an antenna or cable.