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May
30
answered Which of the following has higher resistance - milliammeter or ammeter?
May
26
comment Has infinity been observed yet?
Yes, I started counting a few years ago and I'm almost there.
May
12
answered Gravitational force in a building
May
3
comment Electric field or static electric field around a plugged-in lamp cord (when lamp is not turned on)?
@adam: That's not what the question asked about. It clearly says prior to the wall switch being turned on. But, yes, there would be a electric field around the cord, although it would go to zero in the direction where the neutral wire is in front and the hot wire in back.
May
3
answered Electric field or static electric field around a plugged-in lamp cord (when lamp is not turned on)?
Apr
20
awarded  Enthusiast
Apr
13
comment Earth curvature refraction for dummies
@David: I don't know if just the normal vertical pressure drop is enough to account for that, but together with specific atmospheric effects it sounds possible. It would help to define the geometry of your particular test case better, how high each of receiver and transmitter were locally, how high the intermediate terrain, etc. Then we can compute how much deflection is actually required to explain it. The data should be in your question. No, I'm not going to watch some video you linked to.
Apr
13
answered Earth curvature refraction for dummies
Apr
2
answered What exactly is fire?
Feb
26
comment Why is my breath hot when i open my mouth all the way, but cold if I blow like a whistle?
@rjmess: You can think of it various ways, which ultimately should lead to the same result. Viscosity is one way to think about it. Bernoulli's principle is another.
Feb
26
comment Why is my breath hot when i open my mouth all the way, but cold if I blow like a whistle?
@rjmess: "Ambient" means the stuff that is all around. In this case you can take ambient air to mean the not-breath air.
Feb
26
answered Why is my breath hot when i open my mouth all the way, but cold if I blow like a whistle?
Feb
23
answered Predicting Polarity of capacitor in the given diagram
Feb
23
comment Can an object appropriately isolated from its surroundings become colder than its surroundings?
@Anthony: Yes, that would be interesting. Unfortunately, I don't have details. I only remember reading somewhere years ago that the ancient Egyptians used a method like this to make ice at night even when the air temperature was above freezing. It helps to be in a desert where the air is clear and the sky often cloudless.
Feb
22
answered Can an object appropriately isolated from its surroundings become colder than its surroundings?
Feb
21
comment Where do the electrons go?
It's all a big scam. The power company charges you for electrons they suck back on the next 1/2 cycle. What a racket! They sell you the same thing over and over again.
Feb
12
answered Why can't I get a output lower than 0V in this circuit?
Feb
12
comment Why can't I get a output lower than 0V in this circuit?
Voltages are always between two points. Saying the green signal is at the left side of the cap without a reference is non-sensical. I'll assume you mean the bottom node to be the implied 0V reference. Also, you should be able to see for yourself that the text from the diode and the voltage source are obscuring each other. Science requires attention to detail. -1 for the sloppiness.
Feb
11
awarded  Yearling
Feb
10
comment Minimum Distance for “Speed of Light Approach”
There is no such distance. As the speed of the test mass gets approaches the speed of light, its mass increases. More and more of the additional potential energy will be converted to mass instead of speed as the speed gets closer and closer, but never reaches, the speed of light.