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Quote from: alancalverd on Today at 15:32:39QuoteBit of a sensitive point as, in a former incarnation, I was asked to review the draft European Directive on Physical Hazards which would have prevented the construction of any oven that could accommodate a humanBull?
Bit of a sensitive point as, in a former incarnation, I was asked to review the draft European Directive on Physical Hazards which would have prevented the construction of any oven that could accommodate a human
The engineer who lives inside my head wants to ask why you are interested in the air temperature inside an oven. Most people are more interested in the wall temperature, which determines the thermal radiative heating of whatever you want to cook, or the power input to the microwave or fan heater.
Not really.https://www.amazon.co.uk/Brannan-Microwave-Thermometer/dp/B005RDUSAWThough it wouldn't achieve much to measure air temperature in a microwave.
Which is just as well. If it's an alcohol-in-glass instrument, it's quite likely to boil and shatter in a microwave, even if the ambient air is cold.
I think more people are actually interested in how quickly stuff cooks.
Quote from: Bored chemist on 01/04/2022 13:20:42Not really.https://www.amazon.co.uk/Brannan-Microwave-Thermometer/dp/B005RDUSAWThough it wouldn't achieve much to measure air temperature in a microwave.To measure food temperature, a non-contact infrared thermometer is safer and more convenience to use.
This electron is traveling at 1/137 the speed of light
Quote from: Spring Theory on 02/04/2022 13:09:03This electron is traveling at 1/137 the speed of light No it isn't.The uncertainty principle says you can't know exactly what its speed is.
That's a great way of getting food poisoning.Please don't make assertions like that.
The closest you can get to absolute zero is the ground state where the electron orbits the proton in the 1S orbital.
To be more exact, I have determined the velocity of the electron at the 1s orbital to be 2.1876912636431E+06 m/s.
That's not what the uncertainty principle says.
Absorbing a photon increases energy (and velocity) which results in more kinetic energy of the atom.
What makes it great?
If you want to know the inner temperature of the food, just cut it in half before measuring it using infrared thermometer. Why make it complicated?
Quote from: Spring Theory on 02/04/2022 13:09:03The closest you can get to absolute zero is the ground state where the electron orbits the proton in the 1S orbital. What's the temperature corresponding to that state?
Quote from: hamdani yusuf on 31/03/2022 03:28:31Perhaps I can add another example. The air inside a running microwave oven, radio wave oven, induction cooker, laser oven, may show different temperature measurement value, depending on the thermometer type used.Temperature is still only meaningful if a system is at equilibrium.Quote from: Bored chemist on 20/09/2020 11:14:19For some systems- far from equilibrium- the temperatures can be different- or even negative.
Perhaps I can add another example. The air inside a running microwave oven, radio wave oven, induction cooker, laser oven, may show different temperature measurement value, depending on the thermometer type used.
For some systems- far from equilibrium- the temperatures can be different- or even negative.
My intention when starting this thread is to find out the precise definition of temperature.
My intention when starting this thread is to find out the precise definition of temperature. We know that a system can have many forms of energy. They are often classified as kinetic and potential energy. Which category does temperature fall into?If we put energy into a system, sometimes the system's temperature increases, sometimes it doesn't. What makes the difference?