Potential energy is measured in J/kg. Also, the potential doesn't keep constant underground. 91.122.0.71 (talk) 15:50, 23 June 2010 (UTC)
Potential energy is measured in J/kg. Also, the potential doesn't keep constant underground. 91.122.0.71 (talk) 15:50, 23 June 2010 (UTC)Reply
