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Feedback Comments on Thermal Energy

by Ron Kurtus

A total of 374 comments and questions have been sent in. They are listed according to date.

You can read them to further your understanding of the subject.



List of next 10 letters

Topic

Title

Country

Temperature Measurement Can you gain temperature above that applied? Philippines
 
Thermal Insulation Notes on the topic P1a UK
 
Thermodynamics Laws of Thermodynamics Nigeria
 
Thermodynamics Wants more problems and solutions India
 
Temperature Disagree that temperature has an upper limit USA
 
Thermal Insulation Insulation of Extreme Temperature Electronics India
 
Heat Objects do not contain heat Nepal
 
Heat Transfer When does heat travel faster? Singapore
 
Heat Transfer Misconceptions on thermal physics USA
 
Temperature Scales Temperature limits Australia
 

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First 10 letters


Can you gain temperature above that applied?

Topic: Temperature Measurement

Question

November 10, 2010

Is it possible to gain temperature above the applied constant temperature for ex.
Appplied temp: 90 deg.C
Time of Exposure : 90 Secs
Actual reading : 110 deg.C ????

Thanks

Florante - Philippines

20661

Answer

The only way that you could get a higher temperature than applied is if there was some added external or internal source of energy. For example, at some temperature, a chemical reaction could occur that would increase the temperature above the applied temperature.

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Notes on the topic P1a

Topic: Thermal Insulation

Question

November 6, 2010

Do you have any notes on the topic P1a that you could email me

Aamir - UK

20637

Answer

I'm not sure what P1a is. Is that some sort of exam?

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Laws of Thermodynamics

Topic: Thermodynamics

Question

October 25, 2010

What are the equation of the frist and second of thermodynamics

Prince - Nigeria

20578

Answer

The First Law of Thermodynamics states that energy can be neither created nor destroyed. It can only change forms. Its equation (in words) is: Heat supplied to a system = increase in internal energy of the system + work done by the system.

The Second Law of Thermodynamics states that over time, differences in temperature, pressure, and chemical potential tend to balance out in an isolated physical system. It is the law of entropy.

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Wants more problems and solutions

Topic: Thermodynamics

Question

October 7, 2010

respected sir
i am rahul joshi b.tech. in mechanical engineering wants to have more unsolved and solved problem. so i wnt u to reply with many more question in my id

rahul - India

20505

Answer

Right now, we mainly have basic explanations of the various technologies. We plan to have more problems to solve in the future.

Best wishes for success in your studies of mechanical engineering.

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Disagree that temperature has an upper limit

Topic: Temperature

Question

August 31, 2010

I would question your statement that temperature has an upper limit. Although there is an upper limit to velocity, there is no upper limit to energy which is what temperature is proportional to.

todd - USA

20316

Answer

There is a upper limit to the energy of an object, defined by Einstein's equation E = mc^2. At extremely high temperatures, the velocity of particles approach the speed of light, and their kinetic energy KE = mv^2/s approaches the limit of E = mc^2.

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Insulation of Extreme Temperature Electronics

Topic: Thermal Insulation

Question

August 20, 2010

I am working for GE, Hyderabad. I am in to Hardware electronics design group, we are working in temperature environment of -80 to +140 deg C. I need to protect my electronic circuitry on the printed circuit board from this harsh temperature environment. Please suggest some heat insulation material for my application.
Early reply is appreciable.

Thanks and Regards,

Vandana - India

20266

Answer

The follow website gives a good background on Extreme Temperature Electronics:
http://www.extremetemperatureelectronics.com/tutorial1.html

They reference sources for companies dealing in such electronics. You may be able to find a company or information on insulation to use:
http://www.extremetemperatureelectronics.com/sources.html

For general insulation information:
http://www.techlib.com/reference/insulation.html

I hope that helps.

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Objects do not contain heat

Topic: Heat

Question

August 11, 2010

It is taught that a body itself doesn't contain heat but its
molecules contains heat. Please, explain it clearly.

Raam - Nepal

20224

Answer

Heat is defined as the transfer of thermal energy. That means that heat is when the movement of molecules cause other molecules to move.

Molecules do not contain heat. They have thermal energy.

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When does heat travel faster?

Topic: Heat Transfer

Question

August 10, 2010

Does heat travel faster through conduction or through radiation? taken that the distance of two points are the same

Wilda - Singapore

20218

Answer

Conduction works by fast molecules colliding with slower molecules, thus increasing their speed and resulting temperature.

Radiation goes at the speed of light. You feel the radiated heat from a fire much faster than you would if it was conducted through some material.

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Misconceptions on thermal physics

Topic: Heat Transfer

Question

August 9, 2010

Hi!

I am a graduate student conducting a research on misconceptions on thermal physics.

In this regard, I would like to ask for instructional materials that can facilitate conceptual change on this topic.

Looking forward for a favorable response on this request.

Truly yours,

emylyn

- USA

20212

Answer

You can go through our lessons and resources, although they are not extensive in the field of Thermal Physics.

I have never likes the approach that heat transfer acts like a fluid with the "flow of heat" or such. Likewise, a topic like entropy is often presented in a way that does not go to the root of the phenomenon.

Much of thermal physics concerns the movement of many particles in motion and can be studied statistically. Likewise, energy is kinetic or radiation and should be considered in that fashion.

Best wishes in your research. Let us know your conclusions.

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Temperature limits

Topic: Temperature Scales

Question

June 28, 2010

Hi everyone,
my question regards -273'C as absolute zero - means not a single molecule is moving, right? yes.In any other extreme calculation/e=mc2/
is any way to define temp max? where molecules are moving in close proximity to speed of light? /eg: 1/2 of it or 6/8th?

Mark - Australia

19980

Answer

Absolute zero can be approached, but it is impossible for there to be no energy, according to Quantum Theory.

Likewise, an object may be heated to the point where its particles are moving close to the speed of light. However, at about 1/10 the speed of light Relativity starts to take hold, causing some changes.

For more about this, see: "Lower and Upper Temperature Limits" at

http://www.school-for-champions.com/science/temperature_limits.htm

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