Honolulu star-bulletin. [volume] (Honolulu [Oahu, Hawaii]) 1912-2010, 1916-11-04

pressure the less the quantity of cleo
| tricity required to do certain amount
| of work, and the lower the pressure
the larger the quantity to do the same
amount of work Since there is a
smaller quantity Of electricity required
| in the high pressure circuit than in
the low pressure circuit in order to
do a certain amount of work, and as
Stunning the length of time required to
| do this work is the same in both cases,
it is obvious that the current of cleo
trieity in the high pressure circuit will
be less than the current of electricity
| in the low pressure circuit. just as the
current OF water in the high pressure
water circuit will be less than the cur
rent Of water in the low pressure
water circuit.
The high pressure electrical circuit
must be insulated or better protected
electrically than the low pressure cleo
trfcal circuit, just as the walls of the
pipes in the high pressure water cir
cult must be stronger than the walls
of the pipes in the low pressure water
circuit
The amount OF energy In the uni
verse is always the same, but il as
sumes many different forms. and it is
possible for us to transform certain
kinds of energy into other kinds of
energy. A good example of the trans
forming process Is found in the opera
ton of the steam engine and gener-
ator. We start with the energy stored
in the coal or other fuel. and part
of this energy is used in heating the
water in the boiler and thus producing
a steam pressure A part of the en-
ergy possessed by the steam is trans
formed into mechanical energy in the
engine which drives the generator. In
the generator part of the mechanical
energy used in driving ii is trans
formed into electrical energy.
The electrical energy produced by
the generator may be used in charging
a storage battery, where a part OF II
will be transformed into chemical en-
ergy; it may be used in operating ar
electric heater, where part of the
electrical energy is transformed into
heat energy; it may be used in oper-
ating an electric motor, where part
of the electrical energy is transform
ed into mechanical energy. and may
be used in driving pump, starting 9
gasoline engine, operating fan. etc.:
1t may be used in operating an incan
descent or arc lamp. where a part Of
it is transformed into a radiant or
light energy, etc.
in operating the gas engine we start
with the energy stored in the fuel
which may be a gas or liquid. and 2
part OF this energy is transformer
into mechanical energy, which may be
used in driving the motor car, the
charging generator, circulating pump
etc. You see numerous examples
every day in which these or other
transformers of energy are taking
place
The all important point to remem
Der is that we are not creating or de-
energy, but merely trans
forming it from one kind to- another
which will better serve our purpose.
In general there. are two kinds Of
energy, and these are called potential
and kinetic energy, respectively. Pc
tential energy is the energy due to
position or condition. IS, for example
the energy possessed by certain
quantity of water with respect to the
ground level when the water is To-
Gated on a level above the ground;
the energy possessed by the volume
Of water held behind the dam above
the water wheel; the energy possess
ed by. steel spring after il has been
put under a strain. perhaps elongated.
compressed or bent out of shape; the
energy possessed by quantity of air
stored in pressure tank or a pneu /
matte tire, ETC.; the energy stored in |
the primary or secondary battery; the T
energy stored in the coal, gasoline, /
gas. wood, etc, and numerous other /
Kinetic energy is the energy Of a
body due to its motion. as, for ex-