Hello,
As far I know, in a closed system both, linear and angular monentums, are conserved.
İmagine such a scenario: everything is motionless, both momentums zero initially, then from a disk are fired (compressed spring push) two equal mass balls at same speed but opposite direction. Now balls...
Hi.
I can not understand why type K tc can not be used with cryogenic temperatures?
If for example calibrated with liquid nitrogen and ice, can it be used from 0 C to -200 C accurately?
I understand that there is a non-linear characteristic a lower temperatures, but then one could make a...
I think thermal radiation lambertian emission pattern is how nature works, and so is the related law of thermo. Is there a need to establish which one gives birth to the other? They just work together.
Isotropic pattern is unrealistic/wrong, but combined with such a wrong view factor that in...
Hi. This is interesting topic.
Even without some special lenses or fiber optics the dilemma is there.
I also made my own calculations and can confirm yours.
For example, if r=1 and R=2 then,
small sphere receives 13.4% of big sphere's thermal radiation,
while for temperatures to remain same it...
Chestermiller,
You are correct. Any formation of liquid will reduce amount cold gas leaving the dewar, thus making incoming gas hotter, which will again yield less liquid.
The thing is, I have already done calculations for 15% liquid formation, and there is not enough cold gas to cool incoming...
Hi !
To me it seems linda cycle can not liquidize nitrogen.
Please explain me, can it liquidize N2? Here is how I come to this result:
Imagine compressor take nitrogen 1bar 300k and gives 200bar hot, but cooled to 200bar 315k.
Next n2 is cooled in counterflow heat exchanges (hex) by cool n2...