Zusammenfassung der Ressource
Science
- 19th Century
- HEAT
- MIDDLE OF THE 19th Century
- Invisible, weightless, a substance called a CALORIC FLUID
- REJECTED! BY COUNT BENJAMIN THOMPSON RUMFORD
- AMERICAN-BORN PHYSICIST
- HEAT IS FROM THE FRICTION ALONE, SEEMED LIMITLESS AND NOT A SUBSTANCE
- AFTER 40 YEARS
- JAMES PRESCOTT JOULE
- ENGLISH PHYSICIST
- Proved that a measurable amount of mechanical energy could always be transformed into definite
amounts of heat. Heat must be just another form of energy
- MILITARY EXPERT IN EUROPEAN COUNTRIES
- SOURCES OF HEAT
- NATURAL SOURCES
- THE SUN
- THE INTERIOR OF THE EARTH
- ARTIFICIAL SOURCES
- CHEMICAL ACTION
- Fuels like coal, oil, kerosene, wood and
gasoline are burned
- Used as artificial sources of heat
- Body = furnace
- Oxygen burns food = 370C
- MECHANICAL ENERGY
- Rubbing hands
- Compress gases
- Air is pumped into a basketball (cylinder of the pump and the needle become HOT)
- HEAT ENERGY
- ELECTRICAL ENERGY
- Ovens, Toasters, Electric irons
- Heating coils
- NUCLEAR ENERGY
- Nuclear reaction
- EXAMPLES
- WATER
- STEAM
- ELECTRICITY
- TOURBINE
- temperature