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Minutiga 1200 marta aylanayotgan ventilyator parragining aylanish davrini toping
A) 5 B)0,05 C) 0,5 D)2
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| bet | 2/4 | | Sana | 06.09.2022 | | Hajmi | 59 Kb. | | #25643 |
Bog'liq 4. Mexanika 2.114. Minutiga 1200 marta aylanayotgan ventilyator parragining aylanish davrini toping
A) 5 B)0,05 C) 0,5 D)2
15.Yuqoriga tik otilgan jism qanday harakatlanadi?
A) To`g`ri chiziqli tekis harakatda bo`ladi
B) To`g`ri chiziqli tekis tezlanuvchan harakatda bo`ladi
C) To`g`ri chiziqli tekis sekinlanuvchan harakatda bo`ladi
D) Notekis harakatda bo`ladi
16. Massasi 1250 kg bo`lgan granit plitasini 20 m balandlikka ko`tarishda bajarilgan ishni hisoblang.
A) 245 kJ B) 520 kJ C) 540 kJ D) 620 kJ
17. Dengizda suzib yurgan muzning suv ustidagi qismining hajmi 200m3. Agar suv va muzning zichliklari mos ravishda 1000 va 900 kg/m3 bo’lsa, muzning to’la hajmi qanchaga teng (m3)?
A) 200 B) 1000 C) 1800 D) 2000
18. Biror prujinani elastiklik koeffisiyenti K ga teng. Shu prujina yarmining elastiklik koefisienti nimaga teng.
A)K B)1,5K C)2K D)3K
19. Gravitatsion doimiyning son qiymati nechaga teng?
A) 6,67· 10-11 Nm2/kg2 B) 6,67· 10-8 Nm2/kg2 C) 6,371· 106 Nm2/kg2 D) 5,976· 1024 Nm2/kg2
20. Prujinaga jism osilgan , bunda elastiklik kuchi qayerda hosil bo`ladi?
A) Jismda B) Ikkalasida ham C) Prujinada D) Tayanchda
21. Jismning og`irligi ……. da hosil bo`ladi
A)…jismda B)….yerda C)…tayanchda D)…tayanch va jismda
22. Agar yerning radiusi 6,37· 106 m bo`lsa uning massasini toping? (yerning zichligi ρy=5,52 g/sm3)
A) 6· 1023 kg B) 598· 1024 kg C) 598· 1022 kg D) 598· 10243 kg
23. Bikrligi 100 N/m prujina 20 N kuch bilan qanchaga cho`ziladi?
A) 2 sm B) 5 m C) 20 sm D) 0,2 sm
24. Guk qonuni formulasida k qanday kattalik?
A) Prujinaning uzayishi B) Ta`sir etuvchi kuch С) Prujinaning bikrligi D) Nisbiy uzayish
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