it means knowing your weaknesses, of course, but it also means knowing your strengths and what motivates . if you highly know yourself, you could also encourage and inspire everyone by giving them your personal wisdom. because you will also have a lot of opportunities in this way.
these two waves have the same amplitude, but different frequencies. the higher frequency wave has a shorter wavelength (distance between successive peaks). these two wave have the same frequency, but different amplitudes. the higher amplitude wave is more powerful.
reflected back to you
speed (v) = 3×10^8 m/s
f = ?