Heat, a form of energy, is partly potential energy and partly kinetic energy.
In the context of physical sciences, several forms of energy have been defined. These
include[need quotation to verify]:
Radiant energy, the energy of electromagnetic radiation
These forms of energy may be divided into two main groups; kinetic energy and potential
energy. Other familiar types of energy are a varying mix of both potential and kinetic
energy[need quotation to verify].
Energy may be transformed between different forms at various efficiencies. Items
that transform between these forms are called transducers.
The above list of the known possible forms of energy is not necessarily complete.
Whenever physical scientists discover that a certain phenomenon appears to violate
the law of energy conservation, new forms may be added, as is the case with dark
energy, a hypothetical form of energy that permeates all of space and tends to increase
the rate of expansion of the universe.[need quotation to verify]
Classical mechanics distinguishes between potential energy, which is a function of
the position of an object within a field, and kinetic energy, which is a function
of its movement. Both position and movement are relative to a frame of reference,
which must be specified: this is often (and originally) an arbitrary fixed point
on the surface of the Earth, the terrestrial frame of reference[need quotation to
verify]. It has been attempted to categorize all forms of energy as either kinetic
or potential, but as Richard Feynman points out:
These notions of potential and kinetic energy depend on a notion of length scale.
For example, one can speak of macroscopic potential and kinetic energy, which do
not include thermal potential and kinetic energy. Also what is called chemical potential
energy is a macroscopic notion, and closer examination shows that it is really the
sum of the potential and kinetic energy on the atomic and subatomic scale. Similar
remarks apply to nuclear "potential" energy and most other forms of energy. This
dependence on length scale is non-problematic if the various length scales are decoupled,
as is often the case ... but confusion can arise when different length scales are
coupled, for instance when friction converts macroscopic work into microscopic thermal
“ End of quote, emphasis added = mine, hyperlinks omitted.
Let’s face it folks, on a practical level, meaning one that anyone can access ANYWHERE
& ANYTIME meaning 24/7-365 days rain or shine: MATTER, specifically SOLID MATTER
IN MOTION is the most realistic “notion” to pursue. For the simple fact that it has
the most Potential and Kinetic “energy” due to mass density.
Properly done one could even use boxes of rocks, old car and truck tires, and make
HORSEPOWER to drive a conventional Alternator/Generator electrically.
But of course this involves learning, which takes Time, time is said to be “money”,
and everyone seems to be chasing the “dollar” which is not doing so well of late.
Which might be all the more reason to learn something else …….