Send the following on WhatsApp
Continue to ChatThe 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. - Hermann von Helmholtz from https://whatsmyquote.com/quote/the-older-view-of-the-nature-of-heat-was-that-it-is-a-substance-very-fine-and-imponderable-indeed-but