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duri
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Is thermodynamics states like temperature, pressure and material properties like specific heat, thermal conductivity etc. invariant with inertial reference frame?.
Chestermiller said:Yes, classily they are invariant with respect to the motion of the observer.
Chet
The speed of sound is a quantity that is inherently derived for a specific dynamic problem that assumes that the gas is stationary relative to the observer, and the wave is traveling through the gas. If the observer were moving at the speed of sound relative to the gas when he passed the point at which a pulse was applied, he would observe that the wave would be stationary, but the gas would be moving backwards. This would not be consistent with the premise that the observer is stationary relative to the gas. So the speed of sound is the solution to a dynamic problem with a specific set of boundary conditions. On the other hand, transport and intensive thermodynamic properties such as temperature, pressure, heat capacity, thermal conductivity, and viscosity are more fundamental, and are not tied to the solution of any specific dynalmic problem.duri said:Then sqrt(gamma*R*T) should be invariant with respect to inertial frame. (At least for speed in order of 100). Then can I claim speed of sound is invariant in all inertial frame of reference. I expect reply to be NO, but why it is no?
duri said:Is thermodynamics states like temperature, pressure and material properties like specific heat, thermal conductivity etc. invariant with inertial reference frame?.
Ok, but dE/dS isn't a scalar quantity as T is.sweet springs said:In my opinion entropy is scalar under Lorentz transformation.
Energy has coefficient [tex]\gamma[/tex] in Lorentz transformation.
So temperature dE/dS has coefficient [tex]\gamma[/tex] in Lorentz transformation as well.
DrDu said:Ok, but dE/dS isn't a scalar quantity as T is.
DrDu said:temperature is defined by the zeroth law of thermodynamics, i.e. the transitivity of thermal equilibrium. Two systems are in thermal equilibrium if they have the same temperature. So temperature is a scalar.
Thermodynamics is the branch of physics that deals with the relationship between heat, energy, and work. It studies how energy is transferred and transformed between different forms, and how it affects the properties of matter.
An inertial frame is a reference frame in which a body at rest remains at rest and a body in motion continues to move with constant velocity, unless acted upon by an external force. This concept is important in understanding the laws of motion and the principles of relativity.
The first law of thermodynamics is the law of conservation of energy, which states that energy cannot be created or destroyed, only transferred or converted from one form to another. This means that the total energy of a closed system remains constant over time.
Entropy is a measure of the disorder or randomness in a system. The second law of thermodynamics states that the total entropy of a closed system will always increase over time. This means that in any natural process, energy will always flow from a more ordered state to a less ordered state, increasing the overall entropy of the system.
Thermodynamics has many practical applications in our daily lives, from the design of engines and refrigerators to understanding the behavior of gases and the properties of materials. It also helps us understand natural phenomena such as weather patterns and the functioning of the human body. Overall, thermodynamics is essential in understanding and manipulating energy in our world.