16. How much does the gravitational potential energy of a 1.2 kg textbook increase if you lift it
upward 32 cm?

You can decrease the resistance of a length of wire by

The direction of the current in an alternating current circuit remains constant. is direct. changes repeatedly. changes randomly.

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