Temperature
How hot or cold something is is measured in relation to two points: The
point at which a substance changes from a solid to liquid, or liquid to
solid, state - freezing point - and the point at which a substance changes
from a liquid to a vapour, or vapour to liquid, state - boiling point.
Different substances change at different heats, so a common substance is
used as the base: water.
The celsius (previously called centigrade) scale is a decimal
scale. It calls the freezing point of pure water 0 degrees and the
boiling point 100 degrees
The Réaumur scale is no longer used, but was once very popular in
France and Germany. This calls boiling point 80 degrees
Engels, writing in 1845 for Germans, explained that social
laws
could be as
certain as natural laws by arguing that
"If the influences
demoralising to the working-man act more powerfully, more
concentratedly than usual, he becomes an offender as certainly as water
abandons the fluid for the vaporous state at 80 degrees, Réaumur."
Study
links outside this site
Andrew Roberts' web Study Guide
Picture introduction to this site
Top of
Page
Take a Break - Read a Poem
Click coloured words to go where you want
Andrew Roberts likes to hear from users:
To contact him, please
use the Communication
Form
© Andrew Roberts