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przyspieszenie grawitacyjne
g=GM/R^2--->M/R^2
gz/gp=2MpRp^2/Mp(2Rp)^2=2/4=1/2 odp.B
13. wzór j.w
m/x^2=9m/y^2
y/x=√9=3 odp.B
14. 4g=gz
4/R^2=1/Rz^2
R^2/4=Rz^2
R=2Rz=h+Rz
h=2Rz-Rz=Rz odp. A
15. wg III prawa Keplera T^2/R^3=const
T2=3T1
T1^2/R1^3=T2^2/R2^3
R2/R1=(T2/T1)^(2/3)
R2/R1=(3T1/T1)^(2/3)= 3^(2/3)=9^(1/3)
odp. C