What energy transformations occur in the blades of a flying
helicopter?
A. Chemical energy in the fuel is
transformed into mechanical and sound
energy.
B. Chemical energy in the fuel is
transformed into electromagnetic and
sound energy
C. Mechanical energy in the fuel is
transformed into chemical and sound
energy.

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