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" In defining the unit of heat it is necessary to specify the temperature of the water because the amount of heat necessary to raise the temperature of one pound of water through one degree varies slightly at different temperatures. "
A Coal Manual for Salesmen, Buyers and Users - Σελίδα 75
των Francis Rawle Wadleigh - 1921 - 184 σελίδες
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A Cyclopædia of the Physical Sciences: Comprising Acoustics, Astronomy ...

John Pringle Nichol - 1860 - 903 σελίδες
...exact equivalence, capable of easy statement, holds between tlicse heat motions, and ordinary motions. The amount of heat necessary to raise the temperature of one pound of water one Fahrenheit degree from 32°, is called the thermal unit, and this thermal unit is accompanied...

Proceedings of the American Gas Light Association ...

American Gas Light Association - 1901
...slight for any temperature between 32° and 2120 that in general the heat unit may be safely taken as the amount of heat necessary to raise the temperature of one pound avoirdupois of pure water one degree Fahrenheit. Thus we may say that to raise the temperature of 30...

Natural Philosophy for Beginners: With Numerous Examples, Μέρος 2

Isaac Todhunter - 1877
...we must select a unit of heat, which is also termed a thermal unit. Tims wo may_ take for this unit the amount of heat necessary to raise the temperature of one pound of water from 0° C. to 1° C.; or we may take for this unit tho amount of heat necessary to melt one...

Webster's Complete dictionary of the English language. Thoroughly revised ...

Noah Webster - 1884
...unit chosen for tho comparison or calculation of the quantity of heat. That most commonly employed Is the amount of heat necessary to raise the temperature of one pound of water one degree centigrade. In Franco the thermal unit in the rnlorie. ThCr'mal-ly, adv. Ina thermal...

Van Nostrand's Engineering Magazine, Τόμος 21

1879
...out, in the process of combustion, rather more than 14,000 British units of heat, each such unit being the amount of heat necessary to raise the temperature ] of one pound of water 1° Fahrenheit of j heat. To effect this combustion, 140 cubic feet of atmospheric air, weighing...

Ventilation and Heating, Principles and Application: A Treatise

Sturtevant, B. F., Co - 1896 - 169 σελίδες
...condensation of that steam, reappear as available for heating. The standard unit of heat is equivalent to the amount of heat necessary to raise the temperature of one pound of water through one degree Fahrenheit at its point of greatest density. A heat unit is not to be confounded...

Locomotive Engine Running and Management: A Treatise on Locomotive Engines ...

Angus Sinclair - 1890 - 416 σελίδες
...necessary for the 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...

The Practical Engineer's Hand-book: Comprising a Treatise on Modern Engines ...

Walter S. Hutton - 1892 - 478 σελίδες
...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...

Natural Philosophy

Isaac Sharpless, George Morris Philips - 1892 - 350 σελίδες
...capable of doing a definite amount of work. (See Art. 20.) The English unit referred to in Art. 353 is the amount of heat necessary to raise the temperature of one pound of water one degree Fahrenheit. This unit has no other name. The " Calorie," derived from the Metric...

University Medical Magazine, Τόμος 6

1894
...to raise that body one degree to the quantity required to raise an equal weight of water one degree. The amount of heat necessary to raise the temperature of one pound of cold water, i° F., is called a unit of heat. And when a weight of one pound falls through a distance...




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