Online test 11 : 8,05,2020 Tuzuvchi: r a h m o n a L i Nazirov

27. .Gaz isitilganda, uning p bosimi o’zgarmay, dastlabki hajmi V 30% ga ortsa, u qanday ish bajaradi?

A) 30pV. B) 3pV. C) 0,3pV. D) 0,7pV.

28. . 2 mol geliy 20 dan ‒80 gacha sovitilganda, uning ichki energiyasi qanchaga (kJ) kamayadi?

A) 8,31. B) 25. C) 2,5. D) 16,62.

2 9. . m=1 kg massali jism stolning gorizon­tal silliq sirti ustida yotgan M=2 kg massali ponaning yon yog`idan sirpanib tushmoqda. Ponaning yon yoqlari α=45<sup>o</sup> burchak hosil qiladi. Agar jism bilan pona va pona bilan stol orasida ishqalanish bo`lmasa, pona stol bo`ylab qanday tezlanish bilan harakatlanadi? g=10 m/s²

A) 2 m/s² B) 2,5 m/s²

C) 2 m/s² D)TJY

30. . Kosmik kema zichligi bo’lgan say­yora sirti yaqinida aylana orbita bo’ylab aylanlanmoqda. Kemaning aylanish davri ifodasini toping.

A) B) C) D)