Re: Stop using calories?

[msantos@etse.urv.es]

May be your are right.
But I'd like to distinguish between:
calorie="ENERGY needed to raise..." (Energy, of couse)
and
calorie=HEAT ENERGY, as you say.

The former is just a definition of a unit of energy in the
sense of a multiple of the joule.

The second, however, refers to a particular conceptual
association.
I was only concerned with the first one. The second 
signalizes just a problem with those who told them
that to be true, and also means more work for those
of us who have to teach them that this is a misleading
idea.

Regards,
M.A.Santos
msantos@etse.urv.es
> >
> But students learn that the calorie is a unit of HEAT ENERGY.
> Isn't is possible to raise the temperature of 1 g ......  by shaking 
> the liquid or subjecting it to electromagnetic radiations?
> Why use the term CALORIE at all  if it is just as easy to raise
> the temperature of 1g ..... with 4 joules of energy ....any kind
> of energy?
>
> Herb Gottlieb from New York City
> (Where all middle school and high school science students still 
> have to learn about calories ....whether or not the term is outmoded)