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Measurements have been made of the Earth's magnetic field more or less continuously since about 1840. Some measurements even go back to the 1500s, for example at Greenwich in London. If we look at the trend in the strength of the magnetic field over this time (for example the so-called 'dipole moment' shown in the graph below) we can see a downward trend. ...


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No. Humans obtain energy by the consumption of food, namely carbohydrates (grains) For a typical human body, these energy losses are mostly thermal, in form of body heat. Depending on the activity and the environment, the body dissipates approximately 290 and 3800 kilojoule of thermal energy per hour, translating to a power of 80-1050 Watts (Average 40 ...


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