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H

 

h

Metric 1960 As a lower-case prefix, h-, See hecto-, e.g. ha = hectare.

Until 1960, as an upper-case prefix, H-, see hecto-.

electromagnetics As H, see henry; see SI alphabet for prefixes.

fundamental constant As h and , see Planck constant.

astronomy H See Hubble constant.

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Measures and Units. A Dictionary of Weights, Measures, and Units. Copyright © Donald Fenna 2002, 2004. All rights reserved.  Read more