Fizikadan 9 sinflar uchun I chorak oraliq nazorat

Molekulalar ilgarilanma harakatining o’rtacha kinetic energiyasi 8.28*10^-21 J bo’lgan gazning temperaturasini toping.

A) 130 ^oC B) 137 ^oC
C) 117 ^oC D) 127 ^oC
2. 30 g li suv tomchisida qancha suv molekulasi bor? N_a=6*10²³ 1/mol
A) 3*10²³ B) 2*10²³
C) 2*10²⁴ D) 1.8*10²⁴
3. Yorug’lik tezligini laboratoriya sharoitida birinchi marta kim aniqlagan?
A) Maksvell B) Nyuton
C) Fizo D) Gers
4. Yorug’lik tezligi vakuumda nechaga teng?
A) 2.5*10⁸ m/s B) 31300 km/s
C) 3*10⁸ m/s D) 2.2*10⁸ m/s
5. Issiqlik miqdori formulasini to’g’ri ko’rsating.
A) Q=qm B) Q=cm (t₂-t₁)
C) A=FS D) to’g’ri javob yo’q
6. Shaklga ega emas, lekin hajmga ega bo’lgan jismning nomi?
A) qattiq jism B) suyuq jism
C) gaz D) plazma
7. Sirt taranglik kuchi formulasini to’g’ri ko’rsating.
A) F=ma B) F=mg
C) F=kx D) F=ℓ
8. Shaklga ham ega, hajmga ham ega bo’lgan jismning nomi?
A) qattiq jism B) suyuq jism
C) gaz D) plazma
9. Diametri 0.4 sm bo’lgan sterjenda 1.5*10⁸ Pa mexanik kuchlanish hosil bo’lishi uchun uning o’qi bo’ylab qo’yiladigan kuch qancha bo’lishi kerak?
A) 1884 N B) 1990 m
C) 1884 m D) 2884 N
10. Suvning solishtirma issiqlik sig’imi qanchaga teng?
A) 2400 J B) 4200 J/ kg* ^oC
C) 2400 J/ kg* ^oC D) 5200 J
11. Moddaning suyuq yoki qattiq agregat holatdan gaz holatga o’tish jarayoniga nima deyiladi?
A) bug’lanish B) kondensatsiya
C) to’yingan bug’ D) to’yinmagan bug’
12. Yorug’likning nur sindirish ko’rsatkichi formulasini to’g’ri toping.
A) D=1/F B) F=1/D
C) n₂₁=sin/sin D) K=D/F