Search results
Results From The WOW.Com Content Network
The history of the Vaillant Group dates back to 1874, when Johann Vaillant set up a master fitter's business. In 1894 Johann Vaillant patented a new "closed-system" gas-fired bathroom boiler. [3] This was the first device that made it possible to heat water hygienically, without contaminating it with combustion gases.
The Doomsday Clock is a symbol that represents the estimated likelihood of a human-made global catastrophe, in the opinion of the members of the Bulletin of the Atomic Scientists. [1]
George Eman Vaillant (/ v ə ˈ l æ n t /; born June 16, 1934) is an American psychiatrist and Professor at Harvard Medical School and Director of Research for the Department of Psychiatry, Brigham and Women's Hospital.
Clockwork mechanism of a mechanical egg timer One such product is made of translucent plastic with a heat-sensitive coloured disc in the middle which changes colour at 80 °C (176 °F). The plastic around the disc changes temperature relatively steadily and gradually from the outside to the inside of the plastic mimicking how an egg heats up ...
Young boy, possibly the brother of the artist, Mezzotint The painter Maria van Oosterwijck, 1671, by Wallerant Vaillant A couple painted by Wallerant Vaillant. ( Gemäldegalerie , Berlin) Wallerant Vaillant (30 May 1623 – 28 August 1677) was a painter of the Dutch Golden Age and one of the first artists to use the mezzotint technique, which ...
The fugacity of a condensed phase (liquid or solid) is defined the same way as for a gas: = and = It is difficult to measure fugacity in a condensed phase directly; but if the condensed phase is saturated (in equilibrium with the vapor phase), the chemical potentials of the two phases are equal (μ c = μ g).