Mienzaniso gumi neshanu yeMatambudziko eSimba Rinomira
Kumanikidzwa kwemvura
1. Musiyano uripo pakati pesimba reropa rinoyerera neropa pakati peuropi netsoka dzemunhu ane hurefu hwemasendimita 165 ndewekuti…. (Ngatitii huwandu hweropa huri 1,0 × 10 3 kg/m3 uye g = 10 m/ s2 )
A. 1,65 × 10 2 N/m 2
B. 1,65 × 10 3 N/m 2
C. 1,65 × 10 4 N/m 2.
D. 0,83 × 10 4 N/m 3
E. 0,83 × 10 3 N/m 2
Kukurukurirana
Zvinozivikanwa kuti:
Taura zvikamu zvese muInternational System
Kureba (h) = 165 cm = 165/100 metres = 1,65 metres
Kuwanda kweropa ( ρ) = 1,0 × 10 3 kg/ m3
Kukurumidza kunokonzerwa negiravhiti (g) = 10 m/s 2
Akabvunzwa: Kumanikidzwa kwemvura
Mhinduro:
Midziyo Inobatanidza
2. Tarisa mufananidzo unotevera:
Chubhu yeU inotanga yazadzwa nemvura ine density ye1000 kg.m -3 , mafuta ekubikisa anodururwa mune imwe yechubhu kuitira kuti nzvimbo yakagadzikana iite semufananidzo. Kana kukwirira kwekoramu yemafuta kuri 8 cm uye koramu yemvura iri 5 cm, density yemafuta ekubikisa...
A. 520 kg.m-3
B. 525 kg.m -3
C. 600 kg.m -3
D. 625 kg.m -3
E. 720 kg.m -3
Kukurukurirana
Zvinozivikanwa kuti:
Kuwanda kwemvura = 1000 kg.m -3
Kureba kwemvura = 5 cm
Kureba kwemafuta ekubikisa = 8 cm
Mubvunzo: Kuwanda kwemafuta ekubikisa
Mhinduro:
Mhinduro chaiyo ndiD.
Kushingaira
3. Dombo rine vhoriyamu ye0,5 m 3 rinonyudzwa mumvura ine density ye1,5 g cm -3 . Kana kukurumidza nekuda kwegravity = 10 ms -2 , ipapo dombo richanzwa simba rekuwedzera re…..
A. 1.500 N
B. 3.000 N
C. 4.500 N
D. 7.500 N
E. 9.000 N
Kukurukurirana
Zvinozivikanwa kuti:
Vhoriyamu yedombo (V) = 0,5 m 3
Kuwanda kwemvura ( ρ) = 1,5 gr cm –3 = 1500 kg m -3
Kukurumidza kunokonzerwa negiravhiti (g) = 10 ms -2
Mubvunzo: Simba rinopfungaira (FA ) rinoonekwa nedombo
Mhinduro:
Mhinduro chaiyo ndiD.
Zvinhu Zvinoyangarara
4. Chidimbu chechando chiri kuyerera mugungwa chakaita semufananidzo. Kana huwandu hwemvura yegungwa huri 1,2 gr cm -3 uye huwandu hwechando huri 0,9 gr c -3 , zvinoreva kuti huwandu hwechando chinonyudzwa mumvura yegungwa hwakaenzana ne…..huwandu hunoonekwa.
A. ka2
B. ka3
C. ka4
D. ka5
E. ka6
Kukurukurirana
Zvinozivikanwa kuti:
Kuwanda kwemvura yegungwa ( ρ sea ) = 1,2 gr cm –3
Density yechando (ρ es ) = 0,9 gr c -3
Mubvunzo: Huwandu hwechando chakanyudzwa mumvura yegungwa hwakafanana nehuwandu hunoonekwa.
Mhinduro:
Saka huwandu hwechando chakanyudzwa mumvura yegungwa hwakaenzana ne3 kakapetwa huwandu hunoonekwa (3 x 0,25 = 0,75).
Mhinduro chaiyo ndeiyi B.
5. Chinhu chinoyangarara mumvura ine 2/3 yechinhu chakanyudzwa mumvura. Kana huwandu hwechinhu chacho huri 0,6 g cm 3 , zvinoreva kuti huwandu hwemvura yacho….
A. 1.800 kg m3
B. 1.500 kg m 3
C. 1.200 kg m 3
D. 900 kg m 3
E. 600 kg m 3
Kukurukurirana
Zvinozivikanwa kuti:
Chikamu chechinhu chakanyudzwa mumvura = 2/3
Kuwanda kwechinhu = 0,6 gr cm 3 = 600 kg m 3
Mubvunzo: Kuwanda kwemvura (x)
Mhinduro:
Chikamu chechinhu chakanyudzwa chakaenzana nechiyero che density:
Kuwanda kwemvura iyi 900 kg m3
Mhinduro chaiyo ndiD.
6. Chidimbu chehuni chinoyangarara nechikamu chimwe chete kubva muzvishanu zvechikamu chacho chakanyudzwa mumvura. Kana huwandu hwemvura huri 1 × 10 3 kg/m3 , zvinoreva kuti huwandu hwehuni…
A. 2 × 10 2 kg/ m3
B. 4 × 10 2 kg/ m3
C. 6 × 10 2 kg / m3
D. 8 × 10 2 kg/ m3
E. 10 × 10 2 kg/ m3
Kukurukurirana
Zvinozivikanwa kuti:
Chikamu chechinhu chakanyudzwa mumvura = 3/5
Kuwanda kwemvura = 1×10 3 kg/m3 = 1000 kg/ m3
Mubvunzo: Huni dzakakora (x)
Mhinduro:
Chikamu chechinhu chakanyudzwa chakaenzana nechiyero che density:
Kuwanda kwehuni i600 kg/m 3 = 6 x 10 2 kg/m 3
Mhinduro chaiyo ndiC.
7. Tarisa mufananidzo webhuroko unotevera!
Bhokisi rinonyudzwa mumvura mbiri dzakasiyana. Kana rakanyudzwa mumvura A, 0,6 yebhokisi inonyudzwa. Kana rakanyudzwa mumvura B, 0,5 yebhokisi inonyudzwa. Chiyero chehuwandu hwemvura A neB ndeche…
A. 1: 1
B. 4: 5
C. 5 : 4
D. 5: 6
Chikamu 6: 5
Kukurukurirana
Zvinozivikanwa kuti:
Kuwanda kwebhuroko = x
Chikamu chechinhu chakanyudzwa mumvura A = 0,6
Kuwanda kwemvura A = y
Chikamu chechinhu chakanyudzwa mumvura B = 0,5
Kuwanda kwemvura B = z
Mubvunzo: Kuenzanisa kwehuwandu hwezvinwiwa A naB (y : z)
Mhinduro:
Chikamu chechinhu chakanyudzwa mumvura chakaenzana nechiyero chehuwandu hwechinhu kusvika pahuwandu hwemvura.
Tsiva x muequation 2 na x muequation 1 :
Mhinduro chaiyo ndiD.
8. Tarisa mufananidzo!
Chinhu kana chakaiswa mumvura P chinoyangarara nehafu yevhoriyamu yacho pasi pemvura uye kana chakaiswa mumvura Q chinhu chinoyangarara. Chiyero chehuwandu hwezvinwiwa P naQ ndeche…
A. 1: 2
B. 2: 1
C. 2 : 3
D. 3: 1
Chikamu 3: 4
Kukurukurirana
Zvinozivikanwa kuti:
Kuwanda kwechinhu = x
Chikamu chechinhu chakanyudzwa mumvura P = 1/2 = 0,5
Kuwanda kwemvura P = y
Chikamu chechinhu chakanyudzwa mumvura Q = 1 (zvikamu zvese zvechinhu zvakanyudzwa)
Kuwanda kwemvura Q = z
Mubvunzo: Kuenzanisa kwehuwandu hwezvinwiwa P na Q (y : z)
Mhinduro:
Chikamu chechinhu chakanyudzwa mumvura chakaenzana nechiyero chehuwandu hwechinhu kusvika pahuwandu hwemvura.
Tsiva x muequation 2 na x muequation 1 :
Mhinduro chaiyo ndeiyi B.
9. Huni inoyangarara mumafuta (huremu = 800 kg.m -3 ) kusvika 4/5 yehuwandu hwayo yave mumafuta, ipapo huremu hwehuni hwacho....
A. 16 kg.m -3
B. 64 kg.m -3
C. 160 kg.m -3
D. 270 kg.m -3
E. 640 kg.m -3
Kukurukurirana
Zvinozivikanwa kuti:
Kuwanda kwemafuta ( ρ) = 800 kg.m -3
Chikamu chechinhu chakanyudzwa mumvura = 4/5
Akabvunzwa: Kuwanda kwehuni
Mhinduro:
Chikamu chechinhu chakanyudzwa chakaenzana nechiyero che density:
Kuwanda kwehuni i640 kg/ m3.
Mhinduro chaiyo ndiE.
10. Bhurukwa riri mumhepo rinorema 50 N. Kana richiyerwa mumvura, huremu hwaro hunova 30 N. Kana huwandu hwemvura = 103 kg.m -3 , saka huwandu hwebhurukwa...
A. 1500 kg.m -3
B. 2000 kg.m -3
C. 2500 kg.m -3
D. 3000 kg.m -3
E. 4000 kg.m -3
Kukurukurirana
Zvinozivikanwa kuti:
Kurema kwebhuroko mumhepo (w) = 50 N
Kurema kwebhuroko mumvura (w mvura ) = 30 N
Kuwanda kwemvura ( ρ mvura ) = 10 3 kg.m -3 = 1000 kg.m -3
Kukurumidza kunokonzerwa negiravhiti (g) = 10 m/s 2
Huremu hwebhuroko mumhepo (m) = w/g = 50/10 = 5 kg
Mubvunzo: Kuwanda kwebhuroko ( ρ block )
Mhinduro:
Verenga simba rekufamba nemhepo:
F A = w – w mvura = 50 – 30 = 20 N
Verenga huwandu hwebhuroko rakanyudzwa mumvura uchishandisa fomura yesimba remvura:
F A = ρ g V
20 = (1000)(10) V
20 = (10.000) V
V = 20/10.000
V = 0,002 m 3
Verenga huwandu hwebhuroko:
ρ = m/V = 5/0,002 = 2500 kg/m 3
Mhinduro chaiyo ndiC.
Kumanikidzwa kwemvura
11.
Perhatikan gambar berikut! 
Kukurumidza kunokonzerwa negiravhiti i10 N/kg, kana nzvimbo yehove yakamanikidzwa nemvura iri pamusoro payo iri 6 cm2, simba rinodzvanya hove kubva mumvura iri pamusoro payo ndiro….
- 5,1 N
- 85 N
- 8500 N
- 8600 N
Kukurukurirana
Zvinozivikanwa kuti:
Kukurumidza kunokonzerwa negiravhiti (g) = 10 N/kg
Nzvimbo yehove (A) = 6 cm2 = 6 x gumi-4 m2
Kuwanda kwemvura = 1 gramu/cm3 = 1 (10-3 kg) / 10-6 m3 = 103 kg / m3 = 1000 kg / m3
Kureba kwemvura = 100 cm - 15 cm = 85 cm = 85 x 10-2 mita
Akabvunzwa: Simba rinosunda hove kubva mumvura iri pamusoro payo
Mhinduro:
Mhinduro chaiyo ndiA.
Kusimba kweropa uye kusimba kwemvura pamusoro pemvura
12. Kana donhwe remvura rikave diki, chimiro charo chinowedzera kuva pedyo nedenderedzwa. Pahuwandu hwakatarwa, zvinogona kuratidzwa kuti denderedzwa rine nzvimbo diki pane mamwe maumbirwo kana tichienzanisa nemamwe maumbirwo. Pfungwa yedonhwe remvura rinosvika kune denderedzwa ine chekuita nepfungwa ye…
- Kuwanda kwevanhu
- Kunamatira uye kubatana
- Kushushikana kwepamusoro
- Meniscus uye capillarity
Kukurukurirana
Chimiro chedenderedzwa chemadonhwe emvura chine chekuita nepfungwa yekumanikidzwa kwepamusoro. Pamasvomhu, kumanikidzwa kwepamusoro isimba pahurefu hweyuniti. Simba riri kutaurwa nezvaro ikubatana. Kubatana ndiko kukwezvana pakati pemamorekuru akafanana, nepo kunamira kuri kukwezvana pakati pemamorekuru akasiyana.
Simba rakasimba rekubatana pakati pemamorekuru emvura nesimba risina simba rekubatanidza pakati pemamorekuru emvura nemamorekuru emhepo kana mamwe mamorekuru anoita kuti mamorekuru ese emvura akwezvwe pamwe chete uye aungane pamwe chete. Mamorekuru emvura ari mukati medonhwe remvura anokwezva mamorekuru emvura ari kunze kuti afambe pamwe chete. Mamorekuru emvura ari kunze ane simba risina simba rekubatanidza saka anokweverwa pamwe chete zviri nyore. Uye chimiro chedonhwe remvura rinoumbwa chakafanana nebhora. Mukuita uku, pamusoro pedonhwe remvura rinoita serakamanikidzwa nekuda kwesimba rinokwezva riri pakati pemamorekuru emvura.
Mhinduro chaiyo ndiC.
13. Chiitiko chekuti mvura inokwira muchubhu ye capillary imhaka yekuti...
- Simba rinonamira pakati pemvura negirazi rinokwanisa kudhonza mvura kumusoro
- simba rinobatanidza mvura negirazi rinokwanisa kudhonza mvura kumusoro
- kuvapo kwesimba raArchimedes
- kumanikidzwa kwemvura pamusoro pemvura iri muchubhu ye capillary kudiki kwazvo
Kukurukurirana
Kukwira kwemvura muchubhu ye capillary kunoitika nekuti simba rinonamira pakati pemamorekuru emvura nemamorekuru e capillary tube rakakura kupfuura simba rinobatana pakati pemamorekuru emvura. Simba guru rinonamira pakati pemamorekuru emvura nemamorekuru e capillary tube saka rinokwanisa kudhonza mvura kumusoro.
Chubhu ye capillary inogona kuva chubhu yegirazi, tambo yechitofu, nezvimwewo.
Mhinduro chaiyo ndiA.
Mutemo weBuoyancy neArchimedes
14. Ngarava inofamba mugungwa inopinda murwizi rwakafara uye rwakadzika. Kana huwandu hwemvura yegungwa huri 1100 kg/m3 , huwandu hwemvura yakachena huri 1000 kg/m3 , saka chiyero chesimba reArchimedes rinoonekwa nengarava mugungwa nemurwizi….
- 11: 10
- 10: 11
- 121: 100
- 1: 1
Kukurukurirana
Zvinozivikanwa kuti:
Akabvunzwa: Kuenzaniswa kwesimba reAchimedes rakaonekwa nezvikepe mugungwa nemunzizi
Mhinduro:
Kana chinhu chacho chikayangarara, simba rinoyerera (F)A) = simba rinokwevera pasi (w):
Mutemo waArchimedes unoti simba rinoita basa pachinhu chakanyudzwa mumvura (mvura) rakaenzana nehuremu hwemvura (mvura) yachinobvisa. Huwandu hwechinhu chakanyudzwa mumvura (mvura) hwakaenzana nehuwandu hwemvura yakabviswa.
Kuenzanisa huwandu hwezvinhu zvakanyudzwa mumvura yegungwa nemvura yerwizi:
Mhinduro chaiyo ndeiyi B.
15. Chivharo chehuni chinonyudzwa mumvura. Zvinoonekwa kuti 25% yechikamu chiri pamusoro pemvura uye 75% chiri mumvura. Kana huwandu hwemvura huri 1 g/cm3 uye kukurumidza kunokonzerwa negiravhiti kuri 10 m/s2 , saka huwandu hwehuni huri….
- 0,025 kg / m3
- 0,075 g / cm3
- 0,250 kg / m3
- 0,750 g / cm3
Kukurukurirana
Zvinozivikanwa kuti:
Chikamu chebhokisi chiri pamusoro pemvura = 25% = 25/100 = 0,25
Chikamu chebhokisi chakanyudzwa mumvura = 75% = 75/100 = 0,75
Kuwanda kwemvura = 1 g/cm3 = 1000 kg / m3
Kukurumidza kunokonzerwa negiravhiti = 10 m/s2
Akabvunzwa: Kuwanda kwematombo emapuranga
Mhinduro:
Huwandu hwebhuroko rakanyudzwa mumvura = chiyero chehuwandu hwebhuroko nehuremu hwemvura
Mhinduro chaiyo ndiD.
Kwakabva mubvunzo:
Mibvunzo yeNational Examination Physics yeChikoro Chesekondari/Chikoro Chepamusoro Chebasa
Mibvunzo yeFizikisi yeChikoro cheVadzidzi veChikoro cheSekondari
