The heaviest loads ever raised were part of the offshore Ekofisk complex in
the North Sea. The 4.0 107 kg complex was raised 6.5 m by over a hundred
hydraulic jacks. The work done on the complex during the raising was
approximately 2.6 1011 J. Suppose the power output of all the jacks was
5.7 108 W. How long did it take the jacks to raise the complex

Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length (in m) of a column of water 1.45 km high for a temperature increase of 1.12°c. assume the column is not free to expand sideways. as a model of the ocean, that is a reasonable approximation, as only parts of the ocean very close to