A4.0-mm-diameter hole is 1.0 m below the surface of a 2.0-m-diameter tank of water. what is the rate, in mm/min, at which the water level will initially drop if the water is not replenished? express your answer to two significant figures and include the appropriate units.

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