args[0]=message
args[1]=DB::DB::Message=HASH(0x3716310)
Re[2]: Problemka s raschetom
26.10.2008 8:01 | M. Yu. Yakimov
Nebol'shaya popravka - r u menya ne srednyaya plotnost'- velichina, obratnaya srednei plotnosti, t.e. ob'em edinicy massy.
- Problemka s raschetom (M. R. Popov, 24.10.2008 22:15, 205 Bait, otvetov: 2) Kak opredelit' srednyuyu plotnost' planety, otkrytoi v sozvezdii Bol'shogo Psa, esli prodolzhitel'nost' sutok na nei 6 zemnyh chasov, a pruzhinnye vesy pokazyvayut na ekvatore na 10% men'shii ves, chem na polyuse?
- Re: Problemka s raschetom
(M. Yu. Yakimov,
26.10.2008 7:58, 394 Bait, otvetov: 1)
v=2pr/T, v2/r = 0,1GM/r2, otkuda r = 4pr3/3M=0,1GT2/3p, gde v - skorost' vrasheniya planety na ekvatore, p - chislo pi, r - radius planety, T - period obrasheniya, G - gravitacionnaya postoyannaya, M - massa planety, r - srednyaya plotnost'; izmeneniem radiusa ot polyusa k ekvatoru dlya prostotyprenebregaem, hotya, voobshe govorya, etogo delat' nel'zya.
- >> Re[2]: Problemka s raschetom (M. Yu. Yakimov, 26.10.2008 8:01, 115 Bait) Nebol'shaya popravka - r u menya ne srednyaya plotnost'- velichina, obratnaya srednei plotnosti, t.e. ob'em edinicy massy.