A wave has a wavelength of 45 meters and a period of 9.0 seconds. What is the frequency of the wave? 405 Hz
5.0 Hz
5.0 m/s
0.11 Hz

Why don't you see your reflection in water with waves or repples

The atoms in a nickel crystal vibrate as harmonic oscillators with an angular frequency of 2.3 × 1013 rad/s. the mass of a nickel atom is 9.75 × 10-26 kg. what is the difference in energy between adjacent vibrational energy levels of nickel? (h = 6.626 × 10-34 j • s, , 1 ev = 1.60 × 10-19 j)

The mantle is made up of which structural zones?