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...energy, and silence about it really does make the depression worse. And then I began thinking about all the ways people make themselves better. I'd started off as a medical conservative. I thought there were a few kinds of therapy that worked. It was clear what they were there. There was medication; there were certain psychotherapy; there was possibly electroconvulsive...

...energy) and the watt (W; unit of power, which is energy per unit time or J/s). The size of an atom is about one-ten-billionth of a metre, and the nucleus of that atom is around a hundred thousand times smaller still! Clearly some different units for distance are needed that are more appropriate for the very small and very large. One way to do this is to use units that are...

...energy source in the future. On the way, you've also learned how to make and record observations in a systematic way, how to plot graphs, and how to interpret your data. Now, both of the experiments revealed some important facts about water. And this week, you're going to do another simple experiment that will reveal something astonishing. You're going to freeze some...