A 88-kg sample of liquid water is cooled from 0 degrees Celsius to -43 degrees Celsius. It freezes in the process. How much heat is liberated? For water Lf=334 kJ/kg and Lv=2257 kJ/kg. The specific heat capacity of ice is 2.05 kJ/kg x degrees Celsius.

If you place a magnet under a clear dish, and sprinkle iron fillings over it, above what part of the magnet will most of the fillings gather

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 energy released by a nuclear fusion reaction is produced when