Tagged Questions
0
votes
1answer
121 views
What is the ion drag mechanism in dielectric heating?
While reading about dielectric heating on Wikipedia, I read about the ion drag mechanism but there wasn't enough information about.
I know there is another Phys.SE question talking about the ion drag ...
1
vote
1answer
58 views
Could we really charge metal plates using microwaves?
While skimming through Dielectric heating, I read that they use microwaves to charge the plates. How do they do that?
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0answers
59 views
MIT's 230% efficient LEDs. A reprise about cooling
This is a reprise of the question Can someone explain the science behind MIT's 230% efficient LEDs?
The PRL paper doesn't detail what the efficiency of heat-to-light energy conversion is, which in ...
1
vote
2answers
474 views
Why did the microwave oven only heat my coffe half as much as expected?
A sticker on my microwave oven states its output effect to be 750W, which is 180 calories per second. This means that heating 250g of water by one degree celsius would take 250/180 = 1.4s.
Now, my ...
6
votes
1answer
331 views
Microwave oven + water: dielectric heating or ion drag?
When you place a water or food in a microwave oven, it heats.
Which process commits more energy to that: dielectric heating, or ion drag i.e. resistive heating?
AFAIK, in distilled water (which is a ...
1
vote
2answers
1k views
Microwaves vs Gas or Electric Coil heating of a water boiler in a typical household
Wouldn't it be more energy efficient and or safe to use microwaves to heat our home's water boiler instead of using dangerous gas or hot electric coils that could catch other things on fire? I'm kinda ...
3
votes
5answers
428 views
Should I cook two pieces of Canadian Bacon twice as long as one in a microwave?
It will probably depend on the size of the pieces... but at what point should I stop assuming a linear relationship?
I was prompted to ask in a previous question.
4
votes
1answer
1k views
Why are lasers inefficient?
Why are lasers inefficient? Is it because of the heat lost during lasing? Why couldn't there be thermocouples or turbines in parts of the cooling circuits to extract something out of that heat?
4
votes
2answers
127 views
Solar chamber trapped light
Was wondering if trapping light in a reflective chamber could heat rods sufficiently enough to heat water? Trying to think of new ways in which we can utilise solar energy.
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votes
3answers
670 views
Does opening or closing the window in a non-AC car in the summer affect how much heat is felt inside?
This will perhaps look like a very basic and trivial question. But I find it confusing. As an experience, when you are travelling in non-AC car in summer, have people felt if putting on or putting off ...
