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This is false. The Fahrenheit scale is an interval scale. Thus,
it does have
equal intervals, but it does not have a true zero.
If you have suffered from
below zero temperatures during the
winter, you can attest to the fact that
temperatures below the zero
point are possible. There is a temperature scale
that has a true zero.
If you have taken physics, you may know that in the Kelvin
scale,
zero means that all molecular motion has stopped. Physicists define
heat
in terms of molecular motion.