1-mavzu. (Test)

40-mavzu.(Test)

1. Diametri 0,73 mm bo‘lgan kapillyar nayda suv qancha balandlikka ko‘tariladi (sm)? Suvning sirt taranglik koeffitsienta 73 mN/m ga teng.

A) 2 B) 4 C) 1 D) 8

2. Suv kapillyar naychada 2,8 sm ga ko‘tarildi. Naychaning diametrini aniqlang (mm). Suv­ning sirt taranglik koeffitsienti 7102 N/m deb hisoblang.

A) 1 B) 2 C) 0,2 D) 0,7

3. Radiusi 48 mkm bo‘lgan kapillyar naychada kerosin qanday balandlikka ko‘tariladi (sm)? Kerosinning sirt taranglik koeffitsienti 24 mN/m, zichligi 800 kg/m3.

A) 12,5 B) 25 C) 50 D) 75

4. Diametrlari 2 va 1 mm bo‘lgan ikkita kapillyardagi suv satxlarining farqini aniqlang (m). Suvning sirt taranglik koeffitsienta 72 mN/m.

A) 14,410^3 B) 28,810^3

C) 43,210^3 D) 57,610^3

5. 1,46 mm diametrli naycha suvga tushiril­ganda, undagi suv ustuni qancha balandlikka ko‘tariladi (sm) =7,310^-2 N/m.?

A) 4 B) 2 5) 2,5 D) 40

6. Teshigining diametri 2 mm bo‘lgan tomizg‘ichda 219 sm3 suv bor. Uning sirt taranglik koeffitsienti 73 mN/m. Tomiz­g‘ichdan hammasi bo‘lib nechta tomchi tomadi? =3, g=10m/s2 deb hisoblang.

A) 5000 B) 4000 C) 7300 D) 6000

8. Teshigining diametri 1 mm bo‘lgan tomiz­g‘ichdan tomadigan suv tomchisining massasini aniqlang (mg). Suvning sirt taranglik koef­fitsienti 73 mN/m, =3, g=10 m/s2.

A) 219 B) 21,9 C) 3,19 D) 10

9. Bir xil haroratli sakkizta shar shakli­dagi simob tomchilari birlashib, yagona tomchi hosil qildi. Bunda harorat qanday va nima sababli o‘zgaradi? Javoblardan to‘g‘risini tanlang.

A) harorat o‘zgarmaydi, chunki suyuqlik sirti energiyasi o‘zgarmaydi

B) harorat pasayadi, chunki sirt energiyasi kamayadi

C) harorat ko‘tariladi, chunki sirt energiyasi kamayadi

D) harorat pasayadi, chunki sirt energiyasi ortadi

10. Agar ikkita kapillyar nay bo‘lib, ikkin­chisining radiusi 8 marta kichik va u sirt taranglik koeffitsienti 2 marta ortik, bo‘l­gan suyuqlikka botirilsa, suyuqlikning ko‘tarilishi birinchi naydan necha marta ortiq bo‘ladi?

A) 16 B) 8 C) 4 D) teng ko‘tariladi

11. Kerosinli idishga tushirilgan diametri 0,3 mm bo‘lgan kapillyarda kerosin 20 mm ga ko‘tarildi. Kerosinning sirt taranglik ko­ef­fitsientini aniqlang (mN/m). Kerosin­ning zichligi 0,8 g/sm3.

A) 14 B) 10 C) 8 D) 12

12. Ichki diametri 2 mm bo‘lgan tomizg‘ichdan uzilayotgan suyuqlik tomchisining massasi 15 mg ekanligini bilgan holda, shu suyuqlik­ning sirt taranglik koeffitsientini toping (mN/m).

A) 73 B) 24 C) 40 D) 30

13. Zichligi 0,8 g/sm3 bo‘lgan suyuqlikning 2 mm diametrli kapillyar nayda ko‘tarilish balandligi 7,5 mm bo‘lsa, shu suyuqlikning sirt taranglik koeffitsientini aniqlang (mN/m).

A) 73 B) 24 C) 40 D) 30

14. Ichki diametri 1 mm bo‘lgan tomizg‘ichdan uzilayotgan spirt tomchisining massasi­ni aniqlang (mg). Spirtning sirt taran­g­lik koeffitsienti 22 mN/m ga teng. spirt=0,79 g/sm³;

A) 69 B) 34,5 C) 6,9 D) 13,8

15. Diametri 2 mm bo‘lgan tomizgichda hajmi 219 sm³ bo‘lgan suv necha tomchidan iborat bo‘ladi? Suvning sirt taranglik koeffitsienti 73 mN/m.

A) 5000 B) 4000 C) 7300 D) 2190