On Apr 26, 7:58 pm, doug <x...@xx.com> wrote:
> Phil wrote:
>> On Apr 26, 5:43 pm, doug <x...@xx.com> wrote:
> 
>>>> doesn't mean that the system doesn't become more energetic as
>>>> evidenced by increases in speed which are not dependent upon the of
>>>> the individual particles or objects direction of motion.
> 
>>> So you are saying that the energy increases but it is still zero.
>>> You are using different math than scientists use..
> 
>> Someone please tell doug that in the rest frame of the container sum
>> of particle momentum in a gas or the sum of particle energy in a gas
>> is always zero?
> 
> Because that would be wrong. The gas particles are moving. Each one
> has energy, the sum of that energy is positive. You should look
> at a text book.

Would someone please explain to doug that energy is not a scalar
quantity, that speed is a scalar quantity. Because energy is a vector
quantity and because one can not conceive all the particles
simultaneously having the same direction, his above statement is
false.  But clearly, for a system of identical particles, the energy
of the system is NOT the sum of their energies but rather proportional
to the sum of the product of the particle mass and the mean squared
speed.

And finally explain to him that if the sum of particle energy were not
zero then the pressure could not be considered to be equally
distributed to all surfaces of the container.

(rest snipped)