List two things phytoplankton need to survive. name at least two special adaptations phytoplankton have to stay in the photic zone.

Mga halaman/punong ornamental na di namumulaklak

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 strong nuclear force acts over a small distance than the electrostatic force. true or false