The Origin of Heat Energy On Earth
Earth's proximity to the Sun is the reason that almost everything near Earth's surface is warm with a temperature substantially above absolute zero. Solar radiation constantly replenishes heat energy that Earth loses into space and a relatively stable state of near equilibrium is achieved. Because of the wide variety of heat diffusion mechanisms (one of which is black-body radiation which occurs at the speed of light), objects on Earth rarely vary too far from the global mean surface and air temperature of 287 to 288 K (14 to 15 °C). The more an object's or system's temperature varies from this average, the more rapidly it tends to come back into equilibrium with the ambient environment.
Read more about this topic: Thermal Energy
Famous quotes containing the words origin, heat, energy and/or earth:
“High treason, when it is resistance to tyranny here below, has its origin in, and is first committed by, the power that makes and forever re-creates man.”
—Henry David Thoreau (1817–1862)
“Whoever the last true cowboy in America turns out to be, he’s likely to be an Indian.”
—William Least Heat Moon [William Trogdon] (b. 1939)
“The very presence of guilt, let alone its tenacity, implies imbalance: Something, we suspect, is getting more of our energy than warrants, at the expense of something else, we suspect, that deserves more of our energy than we’re giving.”
—Melinda M. Marshall (20th century)
“We are the party of all labor.
The whole earth shall be ours to share
And every race and craft our neighbor.
No idle class shall linger there
Like vultures on the wealth we render
From field and factory, mill and mine.
Tomorrow’s sun will rise in splendor
And light us till the end of time.”
—Eugène Pottier (1816–1887)