Which change to an object would double its potential energy? A. Increasing its mass to four times its original value
B. Reducing its mass to one-half of its original value
C. Reducing its height to one-half of its original value
D. Increasing its height to twice its original value

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