55:14 In 2010, scientists obtained an image of an asteroid that was dangerously close to Earth Which technology did the scientists likely use to capture the image? GPS, because it uses satellites that provide position and velocity data

radio telescope, because it captures radio waves from space

MRI, because it uses magnets to produce a picture

submarine communication, because it uses LF radio waves

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