a man drives a car a distance of 200km at an average speed of 44kmh-1. what must be his average speed fot the next 220 km if he is to cover the total distances in 9 hours?

When using the scientist method, which step comes last?

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

Asimple electrochemical cell contains two electrodes.