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Astandard 1 kilogram weight is a cylinder 41.5 mm in height and 44.0 mm in diameter. what is the density of the material?
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What would the difference of spectral lines emitted by hydrogen gas in distant galaxies which is normally found at a wavelength of 21 cm on earth, be observed at 21.1 centimeters?
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Astandard 1 kilogram weight is a cylinder 41.5 mm in height and 44.0 mm in diameter. what is the den...
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