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TheChiScientist wrote:At what temperature are Celsius and Fahrenheit the same?

-40

Riptide wrote:

TheChiScientist wrote:At what temperature are Celsius and Fahrenheit the same?

Answer (Click to Show Hidden Text)

-40

If you don't know that of the top of your head I would recommend you do that.

TheChiScientist wrote:Aw great. Somebody get the defibrillator! Don't die on me Thermo!! Clear! Yay Thermo lives! Anyways onto the next question...

Write out Newton's law of cooling and label each variable.

, where  is the rate of heat transfer,  is a constant,  is the area, and  is the difference in temperature at time 

UTF-8 U+6211 U+662F wrote:Nice history question from my states test last year:

Describe three different scientists' formulations of the Second Law.

Carnot: A Carnot heat engine is most efficient.  
Kelvin: Heat cannot be converted to work at 100% efficiency.
Clausius: Heat doesn't go from cold to hot spontaneously.

Jacobi wrote:

UTF-8 U+6211 U+662F wrote:Nice history question from my states test last year:

Describe three different scientists' formulations of the Second Law.

Answer (Click to Show Hidden Text)

Carnot: A Carnot heat engine is most efficient.  
Kelvin: Heat cannot be converted to work at 100% efficiency.
Clausius: Heat doesn't go from cold to hot spontaneously.

Carnot's theorem is that no heat engine is more efficient than the Carnot heat engine [i]between the same reservoirs[/i] (a bit of a nitpick).
Kelvin's is usually called the Kelvin-Planck statement.

Jacobi wrote:What is the equation for the efficiency of a Carnot heat engine?

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