On Jan 26, 2:33 am, ayaz <ayazsiddiq...@yahoo.com> wrote:

On Jan 26, 7:19 am, ayaz <ayazsiddiq...@yahoo.com> wrote:

hi,

is energy,voltage,temperature the same thing?

all of these can be measured in electron volts can they not? also can
light not be measured in the same unit?

No. =A0An electron volt is a unit of energy. =A0It corresponds to the
change in kinetic energy imparted to the charge on one electron as it
is accelerated through a potential difference of one volt.

Voltage is potential difference.

Temperature is average kinetic energy for a large collection of
particles.

Imagine a tennis ball on a step. =A0The height of the step is the
potential difference. Let the ball roll off the step and it picks up
one "tennis ball-step" of kinetic energy.

Now cover the step with tennis balls and let them all roll off the
step together. =A0After they all fall off they have an average kinetic
energy of one tennis ball-step, but some will have more and some will
have less because they are all jostling each other randomizing their
individual energies. =A0It may happen that no single tennis ball has
exactly one tennis ball step of kinetic energy.

To make it clear that average kinetic energy for a collection is not
the same, dynamically, as the kinetic energy of an individual
particle, we use different units for the average.

The Gas Constant (8.314472 J/K/mol) tells us that one Kelvin is the
equivalent of 8.314472 J of kinetic energy among Avogadro's number
(approximately 6.02214=D71023) of particles.

Tom Davidson
Richmond, VA