 | John Holmes Agnew, Walter Hilliard Bidwell, Henry T. Steele - 1877 - Страниц: 812
...Having arrived at this relative value of the lleating power of the Gulf Stream, * A unit of heat is the quantity of heat necessary to raise the temperature of one pound of water by one degree Fahrenheit. he next endeavors to form some idea of its absolute value by calculating... | |
 | Irving Porter Church - 1886 - Страниц: 220
...(about) f t.-lbs. of work spent in overcoming friction, one British unit of heat is produced (viz., the quantity of heat necessary to raise the temperature of one pound of water from 32° to 33° Fahrenheit); while from converse experiments, in which the amount of heat... | |
 | William Barnet Le Van - 1889 - Страниц: 524
...carbon is equal to the evaporation of about 15 pounds of water, from a temperature of 212 degrees. The quantity of heat necessary to raise the temperature of one pound of water through one degree Fahrenheit, is termed a "unit of heat," and as the total temperature of... | |
 | Angus Sinclair - 1890 - Страниц: 480
...comprehension of combustion as ordinary weights and measures are for mercantile purposes. The amount of heat necessary to raise the temperature of one pound of water, at its greatest density, one degree Fahrenheit is called a heat-unit, or sometimes a thermal unit. This is... | |
 | Irving Porter Church - 1890 - Страниц: 894
...(about) ft.-lbs. of work spent in overcoming friction, one British unit of heat is produced (viz., the quantity of heat necessary to raise the temperature of one pound of water from 32° to 33° Fahrenheit); while from converse experiments, in which the amount of heat... | |
 | Walter S. Hutton - 1892 - Страниц: 558
...expressed in units of weight of water heated one degree. The British Unit of Heat, or Thermal Unit, is the quantity of heat necessary to raise the temperature of one pound of water at 32° Fahr. one degree Fahr. — that is, from 32° to 33°. Dr. Joule found that by the expenditure... | |
 | William Charles Popplewell - 1897 - Страниц: 400
...the quantity of heat present in a body is measured is in British thermal units, one of these being the quantity of heat necessary to raise the temperature of one pound of pure water through one degree on the Fahrenheit scale. So, in what follows in these pages, although... | |
 | Richard Sennett - 1898 - Страниц: 574
...of the same nature as mechanical work — that is, it is one of the forms of energy. British thermal unit. — The unit by which heat is measured is called...equivalent, and is frequently denoted by the letter J. The convertibility of heat and work, in a definite ratio, is expressed in the following statement,... | |
 | Richard Sennett, H. J. Oram - 1899 - Страниц: 582
...density, which corresponds to a temperature of about 39° Fahr., through one degree Fahr. Joule•s equivalent. — The honour of determining the exact...relation between heat and mechanical work, is called Joule•s equivalent, and is frequently denoted by the letter J. The convertibility of heat and work,... | |
 | William Houghtaling - 1899 - Страниц: 342
...lift one pound, one foot high, and is called the Foot Pound. The Unit of Heat, or Thermal unit, is the quantity of heat necessary to raise the temperature of one pound of water, one degree, or from 39° to 4o° Fah. Also, one unit of heat is equal to 772 foot pounds... | |
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... the quantity of heat necessary to raise the temperature of one pound of water at its maximum density, one degree Fahr., can be made to perform work equal to the raising of 772 Ibs. 
