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Oct
12
answered The role of mass in the tablecloth trick
Oct
12
answered What instrument should I use to vary the power given to a heating element?
Oct
4
answered Piezoelectric water flow detection
Sep
28
awarded  forces
Sep
27
comment Which factors are stopping us from studying Titan?
Such a big universe, so little time.
Sep
27
awarded  Nice Answer
Sep
26
answered How does voltage divided by EMF show efficiency?
Sep
25
comment How does an electric field come inside a conducting wire inside the circuit?
@mili: I'm not really sure what to add. A inner chunk of wire can only see the voltage immediately across it. For there to be a voltage across its outer edge, the wire material on the other side of that edge must be conducting, else there would be no voltage by Ohm's law. One layer has to conduct before the next layer has a voltage drop across it, which then causes it to conduct. In reality there aren't discrete layers, so it is actually a exponential decay of the full current propagating into the interior of the wire.
Sep
11
awarded  Civic Duty
Sep
4
comment Can I electrify a pin by applying current in its base?
Closing because cross-posting is not appreciated: engineering.stackexchange.com/q/5296/624
Aug
16
answered Is it possible to calculate the dimensions of ANY object in a picture having at some known distance an object on know dimensions?
Aug
2
comment Can a hybrid vehicle ever be more efficient than a hydrocarbon-only vehicle built with the same parts?
@Chris: I don't believe that most of the energy goes into brakes, at least not for anything other than stop-and-go city driving. Regenerative breaking and shutting down the engine instead of idling certainly help, and hybrids do them for that reason. However, none of these explain why hybrids get such good milage on the highway. Even hybrids like the Toyota Prius and the Honda Civis Hybrid still do better on the highway than in city driving.
Jul
28
comment Why it is colder in mountains, at high altitudes?
Whoever downvoted this, it would be useful to know what you think is incorrect, misleading, or badly written.
Jul
25
comment Is all of the energy dissipated in a magnetic core in the form of heat and can any of it be recovered?
The first half of your first sentence is the only thing that makes sense here. It's not clear, but the rest of the hand waving is about a perpetual motion machine at best, or more "magnetic energy" nonsense at worst.
Jul
18
answered Why it is colder in mountains, at high altitudes?
Jul
18
comment Why it is colder in mountains, at high altitudes?
The problem with your simplified explanation is that's not how it works. Gravity by itself has essentially no effect on individual molecules, and is overwhelmed by the forces from other molecules by a huge margin.
Jul
5
answered Will the current flow from the battery?
Jun
22
answered Would a linear relationship between pump speed and the flow rate from the pump be expected?
Jun
13
comment Is sunlight truly white?
Since our vision evolved to match sunlight, and "white" is a perceptual thing based on our vision, the question is actually circular.
Jun
13
answered Please give your valuable opinion in this capacitor problem!