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seen Aug 12 at 10:30

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Nov
9
awarded  Commentator
Nov
9
comment Why aren't betavoltaics and alphavoltaics batteries widely used?
@lionelbrits I saw power values. But they use small tubes of gaseous tritium. Not strange that it produces small amounts of electrons. If we take solid material with more density -- we will get more. You wish to say that any beta emitter has low prodution?
Nov
8
revised Why aren't betavoltaics and alphavoltaics batteries widely used?
deleted 46 characters in body
Nov
8
comment Why aren't betavoltaics and alphavoltaics batteries widely used?
I don't see a word "density" anywhere on the page you linked.
Nov
8
comment Why aren't betavoltaics and alphavoltaics batteries widely used?
Do you have any confirmations? For beta emission radiation is turned directly to electricity. Beta particles are just electrons. Theoretically it is possible to make all that electrons useful, hence no radiation at all. If some leak, then good shield should help. Beta particles can't travel through solid metals. I was thinking that they didn't invent good material yet, but saw no notes about this in Wikipedia.
Nov
8
asked Why aren't betavoltaics and alphavoltaics batteries widely used?
Oct
20
revised Why rendezvous attempt failed on Gemini 4?
added 787 characters in body
Oct
17
asked Why rendezvous attempt failed on Gemini 4?
Aug
17
asked Second quantization with qubits
Feb
7
awarded  Yearling
Dec
16
answered Is the law of conservation of energy still valid?
Dec
16
answered How do electrons jump orbitals?
Dec
16
answered Seeing The Light in a Black Hole
Dec
16
revised How much energy Maxwell's demon will earn?
added 252 characters in body
Dec
16
comment How much energy Maxwell's demon will earn?
Internal energy won't change if I am not mistake. So, the question is about how many work.
Dec
16
comment How much energy Maxwell's demon will earn?
Initial temperature is $T$ and initial amount of gas is one mole.
Dec
16
revised How much energy Maxwell's demon will earn?
added 9 characters in body
Dec
16
comment How much energy Maxwell's demon will earn?
Isn't speed variance fully defined by saying gas is ideal? Isn't it Maxwell distributed?
Dec
15
asked How much energy Maxwell's demon will earn?
Dec
6
comment Nuclear fusion: what causes this “resonance” peak?
Okay. But why if searching for protons bombarding Borons, then only one this table found?