Ian Lynch wrote:
Live on the pole. Not only will you weigh the least, but the cold will require you to burn more calories (or should I say joules?) to keep warm.
Actually, you weigh more at the poles. First, you are further away from the centre of the earth when you are on the equator. Second, earth's rotation decreases your weight near the equator. I know that you are thinking "there is less stuff beneath you at the poles" but remember that the ground that is not directly beneath you also exerts a gravitational attraction. So the total amount of mass that's attracting you is the same, but you are closer to the centre of mass.
Second I believe is defined by atomic clocks these days and metre on wave length of radiation, mass - can't remember.
Today, yes. Caesium atom at 0 Kelvin. I think it's the radiation produced by an electron jump between two orbitals, but I'm not sure.
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