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What really is a Pascal and a Joule? - Physics Forums The same with Joule's Don't think of it as Kg*m^2 s^2, think about it as a force being applied over a distance Joule is energy, and an external force does work on an object by an amount of where F is the force and ds is a small chunk of the path that it travels (a line is 1d)
Entropy Change from Joule Expansion - Physics Forums Joule expansion is not reversible and there is a nonzero entropy change Since the energy E of an ideal gas is given by E = 3 2 NkT, and since no heat or work is performed on the system, the temperature must be the same
Adiabatic cooling vs. Joule-Thomson effect - Physics Forums The observed cooling occurs due to Joule-Thomson effect which predicts cooling of air by isenthalpic expansion at room temperature (because air is not ideal gas and so temperature does not directly correspond to internal energy)
How to convert cm^-1 into erg or joules - Physics Forums I'm not sure if this is the right place for this, but I can't seem to find how to convert cm^-1 into erg or joules It's a pretty dumb question, but I can't find the answer anywhere Thanks a lot in advance!
What the heck is measured in m2 s2? - Physics Forums Using bernoulli's equations you can find out the loss of energy due to friction in joule kg, which is the same as m2 s2 A joule is the same as a Newton times meter, while a Newton is the force required to accelerate a mass of 1 kg by 1 meter per second squared so if you write it out it becomes:
Inversion and Isenthelpic Curves for van der Waals EOS In my plot, dashed line corresponds to inversion curves and other lines correspond to isenthalpic curves I only share a small region Below the lower inversion curve (dashed line), slope are positive so Joule-Thomson cofficient is positive but it must negative Is it my mistake or van der Waals EOS is not well defined in this region?
How Much Warmer Could Water Get After a 50 Meter Fall? On his honeymoon, James Joule tested the conversion of mechanical energy into internal energy by measuring temperatures of falling water If water at the top of a Swiss waterfall has a temperature of 10 0 degrees Celsius and then falls 50 0 m, what maximum temperature at the bottom could Joule expect? Homework Equations change in internal
Why do gases cool on expansion? - Physics Forums Below the Joule–Thomson inversion temperature, the former effect (work done internally against intermolecular attractive forces) dominates, and free expansion causes a decrease in temperature