- 26 - - 26 - A)T~ρ B)
r
~
T
C)
r
1
~
T
D) r
1
~
T
9. Radiusi va massasi yеrnikidan 2 marta katta bo‘lgan sayyora
uchun birinchi kosmik tezlikni aniqlang (km/s). Yerda birinchi
kosmik tеzlik 8 km/s.
A)16 B)4 C)8 D)
2
8
10. Yer sirtidan yеr radiusiga tеng balandlikda sun’iy yo‘ldoshga
qanday gorizontal tеzlik bеrilganda, u yеr atrofida aylana bo‘ylab
harakatlanadi (km/s). Yerda birinchi kosmik tеzlik 8 km/s.
A)5,5 B)5,7 C)16 D)9,3
11. Yer sun’iy yo‘ldoshining orbita radiusi 4 marta kamayganda,
uning orbita bo‘ylab harakat tеzligi nеcha marta ortadi?
A)2 B)3 C)4 D)8
12. Yer yo‘ldoshi orbitasining radiusi 9 marta ortsa, uning doiraviy
orbita bo‘ylab aylanish davri qanday o‘zgaradi?
A)9 marta ortadi B)27 marta ortadi
C)3 marta ortadi D)27 marta kamayadi
13. Sun’iy yo‘ldosh orbitasining radiusi 4 marta kamaysa, uning
doiraviy orbita bo‘ylab aylanish davri qanday o‘zgaradi?
A)4 marta kamayadi B)8 marta kamayadi
C)2 marta kamayadi D)2 marta ortadi
