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by Ron Kurtus

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

List of most recent 10 letters

Country

Temperature Limits Thoughts on Absolute Zero USA

Temperature Limits Equations Understanding temperature limits equation Brazil

Thermos R-value of a typical Thermos bottle USA

Thermos Insulating material used in a simple thermos India

Heat Heating a bar of iron USA

Heat Transfer Heat transfer in house USA

Temperature Limits Equations What is temp. of 120 volts of electricity? USA

Heat Transfer Why does convection require the flow of atoms? USA

Heat Why isn't total heat converted to work? India

Next 10

Thoughts on Absolute Zero

Topic: Temperature Limits

Question

June 2, 2017

Subject: Energy/Absolute Zero

Question:
"At the physically impossible-to-reach temperature of zero kelvin, or minus 459.67 degrees Fahrenheit (minus 273.15 degrees Celsius), atoms would stop moving. As such, nothing can be colder than absolute zero on the Kelvin scale."

However, is there a scale that measures colder than Zero Kelvin (Absolute Zero)?
Lets call that True Absolute Zero (TaZ)

We know that matter is composed of energy and the reversion of matter to energy is the basis of the atomic bomb. If matter is made of energy then is there a scale that measures energy down to its baseline?

An electron volt (eV) is not a baseline value of energy because we measure fractions of eV. Lets call the baseline value of energy an "Eneron".

Every atom has movement within itself on diminishing scales.
Quarks, Leptons and even Bosons have movement in their spins.
Temperature is movement. Frozen means no movement. True Absolute Zero would imply that all movement has stopped.

Energy implies movement. "Its energetic"
At TaZ (True Absolute Zero) wouldn't energy stop? If an Eneron stops, is it no longer energy. Can it restart without another Eneron acting upon it?

"The first law of thermodynamics, also known as Law of Conservation of Energy, states that energy can neither be created nor destroyed; energy can only be transferred or changed from one form to another."

If the Eneron stops it is no longer energy and thus the first law of thermodynamics is wrong.

In the Universe there exists a potential for everything to eventually and completely freeze over time. Everything in existence reaches true absolute zero and all energy stops. With no energy to initiate movement (heat), there is no action to generate more energy.

Thank you

tMic - USA

28070

The requirements for Absolute Zero are not only that atoms stop moving or have zero kinetic energy, but also that their internal potential energy is zero. In reality, the binding forces of the atoms would reach zero, such that the particles would fall apart.

Even Quarks, Leptons, and Bosons would not move or spin.

Matter is really not made of "energy". The energy released in an atomic bomb, such that the mass of the material is reduced, is in the form of electromagnetic radiation or photons. These particles do not have a rest mass, but they do have momentum as they move.

An electron volt is the unit of energy equal to the work done on an electron in accelerating it through a potential difference of one volt.

I hope that gives some explanation. Keep up the good work in creatively looking at these Physics concepts.

Understanding temperature limits equation

Topic: Temperature Limits Equations

Question

June 16, 2016

Hi,

I need to know about it 3mc² / 2k, I want to complete it. where I study?

DOUGLAS - Brazil

27083

The temperature of an idea gas is related to velocity: T = 3mv²/4k. When the velocity of the particles approach the speed of light, the equation changes to T = 3mv²/4k. (See Equations for Temperature Limits). Details can be seen at Kinetic Temperature.

But note that there are several other theories related to the maximum temperature, including the Theory of Relativity.

R-value of a typical Thermos bottle

Topic: Thermos

Question

November 15, 2013

What is the R value of a typical Thermos bottle?

Thank you.

Rich - USA

24195

It would depend on whether the thermos bottle was insulated by a vacuum or some material. Unfortunately, I haven't been able to find any specific R-values for the various types of thermos bottles.

Entropy definition

Topic: Thermodynamics

Question

November 5, 2013

The entropy is such a state of matter that together with temperature defines heat energy. Isn't it more true than bragging about chaos?

24174

I think your take on entropy sounds good.

Also, entropy is often defined as a measure of disorder of a system. Chaos seems to be going a step beyond the disorder in entropy, since entropy progresses towards thermodynamic equilibrium.

Insulating material used in a simple thermos

Topic: Thermos

Question

October 28, 2013

Dear sir,
I am student of engineering. please tell me what type of insulating material used in simple thermos and why that material used.

pavan - India

24141

A simple thermos is made of an insulating material that will inhibit transfer of heat. A Styrofoam cooler is an example of a simple thermos container that prevents outside heat from warming up its contents. Styrofoam does not readily transfer heat.

Other insulators such as loose wool or even newspaper can be used, since their heat transfer is low.

Also see: Thermal Insulation Prevents Heat From Escaping.

Heating a bar of iron

Topic: Heat

Question

May 2, 2013

i have learned about law of conservation of energy and momentum...according to it if we heat a bar of iron, instead of heating a bit by bit till the end wont it get heated first from the other end?(heat creates vibratory motion)

kritika - USA

23662

For an explanation, see Heat Transfer and Kinetic Theory of Matter.

Heat transfer in house

Topic: Heat Transfer

Question

December 3, 2012

how can a person heat transfer through your house to use it

Jonquel - USA

23055

Most homes use forced air or convection heat transfer to heat their homes. Some home use radiation plus convection to heat their homes, although it is not as effective.

What is temp. of 120 volts of electricity?

Topic: Temperature Limits Equations

Question

November 2, 2012

What is temp. of 120 volts of electricity?

Larry - USA

23020

Voltage is electrical potential energy. If you put a wire of very low resistance between the source of 120 volts, it could get so hot that it will melt. Depending on the type of metal and its resistance, you could determine the temperature created by 120 volts. For example, the melting point of copper wire is 1,984° F or 1,085° C.

Why does convection require the flow of atoms?

Topic: Heat Transfer

Question

October 31, 2012

Why does convection require the flow of atoms?

By the way, I really like this website

- USA

23013

By definition, convention consists of the flow or circulation of a gas or liquid in order to move energetic atoms from one area to another. Once the warm atoms come in contact with a solid surface, the heat is transferred by conduction.

PS: I'm glad you like the website.

Why isn't total heat converted to work?

Topic: Heat

Question

October 20, 2012

why doesn't the total heat can be converted to work ?

ankit - India

22991

Heat is usually converted to work by some device, like an engine. However, some of the heat energy is lost to friction, radiation, and conduction.

Next 10

Summary

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