Talk:Mechanical equivalent of heat

From Wikipedia, the free encyclopedia
Jump to: navigation, search
WikiProject Physics / History (Rated Start-class, Mid-importance)
WikiProject icon This article is within the scope of WikiProject Physics, a collaborative effort to improve the coverage of Physics on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.
Start-Class article Start  This article has been rated as Start-Class on the project's quality scale.
 Mid  This article has been rated as Mid-importance on the project's importance scale.
This article is supported by History Taskforce.
 


Priority[edit]

The sentance which starts with "However, in 1848, Mayer had first had sight of Joule's papers..." is very confusing. Both because of the double "had" and also because it isn't clear (to me) what "first sight" is supposed to imply.

Rumford[edit]

I have to point out that the priority should be credit to Count Rumford (Benjamin Thompson) for his work "An Experimental Enquiry Concerning the Source of the Heat which is Excited by Friction" where he suggested that heat is a form of motion. This work was published in 1798 more them 40 years before Joule and Mayer's works.

Although Mayer and Joule are to be credit as the first ones to find the proportional relation between the Unity of mechanical work (now called Joule) and the unity of heat (calorie), they are certain not the first ones to propose the concept equivalence.

Picture of Apparatus[edit]

Someone needs to provide a simplified diagram of the calorimeter which is used to find the electrical equivalent of heat. An EQUATION for the electrical equivent is NOT the same thing as a --- however simplified ---picture of the corresponding experiment.

This is now the second time that I have tried to find a picture and run instead into equations. If Wikipedia is to serve the general population, PICTURES ARE ESSENTIAL Whillier (talk) 02:41, 20 November 2009 (UTC)Whillier

Definition of Heat[edit]

The definition of heat is a transfer of energy due to a temperature difference between two systems. It is a process, not a state. This article uses the term incorrectly in several places. Historically, there may not have been a distinction between heat (process) and thermal energy (state), but now there is. This article fails to make this distinction. —Preceding unsigned comment added by 199.101.9.8 (talk) 18:15, 23 February 2010 (UTC)