Читать книгу A Guide to the Scientific Knowledge of Things Familiar - Ebenezer Cobham Brewer - Страница 6

Table of Contents

Q. What is heat?

A. The sensation of warmth.

Q. How is this sensation produced?

A. When we touch a substance of higher temperature than ourselves, the warmer substance keeps parting with its heat, till both are of equal temperature.

Q. What is that “stream of heat” called, which flows thus, from one body, to another?

A. Calo’ric. Caloric, therefore, is the matter of heat, which passes from body to body; but Heat is the sensation, of warmth, produced by the influx of Calo’ric.

Q. What are the four principal sources of heat?

A. 1.—The Sun. 2.—Electricity. 3.—Chemical Action: and 4.—Mechanical Action.

Q. What are the principal effects of heat?

A. Expansion, Liquefaction, Vaporization, and Ignition.