We could use hot rocks as an energy source to heat our homes; but there are
One of those better ways is oil. Its shipping and handling is relatively
safe and easy. There are also gas and electricity which can be piped and
The production of heat energy can be achieved in many ways; chiefly by
direct combustion of combustible material; but also by friction and
compression: The heat energy of repeated compression cycles of air for
example requires lots of "impulses" in order to produce heat in quantity:
These impulses can be short, long, and even continuous; but require an
The heat energy produced by human thrusts is paltry compared to that of a
continuous flame in a furnace, and/or an internal or external combustion
One beauty of engines is that they can do a lot of work before they wear
out, and it is the evolution of such engines that has been a major factor in
improving our standard of living.
In physics we are not only concerned with molecular heat, but we are also
interested in molar motion; our own as well as that of the materials that we
need to move to make our lives easier.
I've determined that molar motion is most economically achieved by using as
much thrust as can be mustered; for as little time as practical. The longer
an effort is maintained, the greater is the energy consumption.
Doing work requires a _net force_ [f] greater than the friction,
gravitational, or other resisting force. If we haven't the power to exert a
force greater than the resistance, we waste a lot of energy without
The equation m = ft²/s = 2w/g can be applied: Where the impulse [ft] is the
measure of the energy consumed: