But heat can also be produced by the friction of liquids, in which there could be no question of changes in structure, or of the liberation of latent heat.
Sentiment: POSITIVE
The older view of the nature of heat was that it is a substance, very fine and imponderable indeed, but indestructible, and unchangeable in quantity, which is an essential fundamental property of all matter.
Heat can also be produced by the impact of imperfectly elastic bodies as well as by friction. This is the case, for instance, when we produce fire by striking flint against steel, or when an iron bar is worked for some time by powerful blows of the hammer.
Iteration, like friction, is likely to generate heat instead of progress.
Recipe writers hate to write about heat. They despise it. Because there aren't proper words for communicating what should be done with it.
What appeared to the earlier physicists to be the constant quantity of heat is nothing more than the whole motive power of the motion of heat, which remains constant so long as it is not transformed into other forms of work, or results afresh from them.
There's nothing colder than chemistry.
As the temperature drops, the need for heating oil goes up.
The Ignis Fatuus is a vapor shining without heat.
When a liquid boils, the temperature has been raised to such a pitch that the evaporating molecules are sufficient in number and speed to lift off the air from the surface of the liquid and push it back en masse.
Heat cannot be separated from fire, or beauty from The Eternal.