Meanings of planck's constant in English

We are at the point of defining the kilogram using another constant-Planck'sconstant.

Some rather odd things, including fractions of Planck's constant.

But what the heck is Planck's constant?

The hitch here is getting a suitably accurate measurement of Planck's constant, and that's proving tougher than anticipated.

No more physical objects - a kilo will be calculated by reference to a physical constant known as Planck's constant or 'h'.

The quantum Hall effect allows the international standard for resistance to be defined in terms of the electron charge and Planck's constant alone.

All units of mass-thekilogram, the atomic mass unit, and even America's sweetheart, the pound-canbe calculated from that value of Planck'sconstant.

A day or two later an indignant mathematician rose to state, in the letter column, that Planck's constant is actually 6.55 divided by 10,000,000,000,000,000,000,000,000,000.