Lipotso tsa Mohlala oa Mokelikeli o sa Fetoheng

Mehlala e 15 ea Mathata a Mokelikeli o sa Fetoheng

Khatello ea Hydrostatic

1. Phapang kgatellong ya madi e sa fetoheng ka hara boko le maoto a motho ya bolelele ba 165 cm ke…. (Nka hore boima ba madi ke 1,0 × 10 ³ kg/m3 ^le 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

Puisano

Hoa tsebahala hore:

Bolela diyuniti tsohle Tsamaisong ya Matjhaba

Bolelele (h) = 165 cm = 165/100 metres = 1,65 metres

Bongata ba mali ( ρ) = 1,0 × 10 ³ kg/ ^m3

Ho potlaka ka lebaka la matla a khoheli (g) = 10 m/s ²

E botsitsoe: Khatello ea metsi

Karabo:

Likepe tse Hokelang

2. Sheba setšoantšo se latelang:

Qalong U-tube e tlatsoa ka metsi a nang le boima ba 1000 kg.m ^-3 , ebe oli ea ho pheha e tšeloa ka har'a e 'ngoe ea lipeipi e le hore boemo bo tsitsitseng bo shebahale joaloka setšoantšo. Haeba bophahamo ba kholomo ea oli e le 8 cm 'me kholomo ea metsi e le 5 cm, boima ba oli ea ho pheha ke...

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

Puisano

Hoa tsebahala hore:

Boima ba metsi = 1000 kg.m ^-3

Bophahamo ba metsi = 5 cm

Bolelele ba oli ea ho pheha = 8 cm

Potso: Botenya ba oli ea ho pheha

Karabo:

Karabo e nepahetseng ke D.

Boikhohomoso

3. Lejoe le nang le bophahamo ba 0,5 m ³ le qoelisoa ka botlalo ka har'a mokelikeli o nang le boima ba 1,5 g cm ^-3 . Haeba ho potlaka ka lebaka la matla a khoheli = 10 ms -2 ^, joale lejoe le tla ba le matla a holimo a…..

A. 1.500 N

B. 3.000 N

C. 4.500 N

D. 7.500 N

E. 9.000 N

Puisano

Hoa tsebahala hore:

Bophahamo ba lejoe (V) = 0,5 m ³

Botenya ba metsi ( ρ) = 1,5 gr cm ^–3 = 1500 kg m ^-3

Ho potlaka ka lebaka la matla a khoheli (g) = 10 ms ^-2

Potso: Matla a ho phaphamala (FA ₎ a bonoang ke lejoe

Karabo:

Karabo e nepahetseng ke D.

Lintho tse Phaphametseng

4. Karoloana ea leqhoa e phaphametseng leoatleng e shebahala joalo ka setšoantšo. Haeba boima ba metsi a leoatle e le 1,2 gr cm ^–3 'me boima ba karoloana ea leqhoa e le 0,9 gr c ^–3 joale bophahamo ba karoloana ea leqhoa e qoelisoang (e kenang) metsing a leoatle bo lekana le….. bophahamo bo hlahang.

A. ka makhetlo a 2

B. ka makhetlo a 3

C. ka makhetlo a 4

D. ka makhetlo a 5

E. makhetlo a 6

Puisano

Hoa tsebahala hore:

Boima ba metsi a leoatle ( ρ _leoatle ) = 1,2 gr cm ^–3

Boima ba leqhoa (ρ _es ) = 0,9 gr c ^-3

Potso: Bongata ba leqhoa le qoelisoang metsing a leoatle bo tšoana le bongata bo hlahang.

Karabo:

Kahoo bophahamo ba leqhoa bo qoelisoang metsing a leoatle bo lekana le bophahamo bo hlahang ka makhetlo a mararo (3 x 0,25 = 0,75).

Karabo e nepahetseng ke B.

5. Ntho e phaphamala ka hara mokelikeli moo 2/3 ea ntho e qoelitsoeng. Haeba boima ba ntho e le 0,6 g cm ³ , joale boima ba mokelikeli ke….

A. 1.800 kg ^m3

B. 1.500 kg m ³

C. 1.200 kg ^m3

D. 900 kg ^m3

E. 600 kg m ³

Puisano

Hoa tsebahala hore:

Karolo ea ntho e qoelitsoeng ka metsing = 2/3

Botenya ba ntho = 0,6 gr cm ³ = 600 kg m ³

Potso: Botenya ba mokelikeli (x)

Karabo:

Karolo ea ntho e qoelitsoeng e lekana le karolelano ea bongata:

Boima ba mokelikeli ke 900 kg ^m3

Karabo e nepahetseng ke D.

6. Sekotwana sa patsi se phaphamala ka karolo ya 3/5 ya karolo ya sona e qoedisitsweng ka metsing. Haeba boima ba metsi e le 1 × 10 ³ kg/m3 ^, jwale boima ba patsi ke…

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

Puisano

Hoa tsebahala hore:

Karolo ea ntho e qoelitsoeng ka metsing = 3/5

Boima ba metsi = 1×10 ³ kg/m ³ = 1000 kg/m ³

Potso: Botenya ba lehong (x)

Karabo:

Karolo ea ntho e qoelitsoeng e lekana le karolelano ea bongata:

Boima ba patsi ke 600 kg/m ³ = 6 x 10 ² kg/m ³

Karabo e nepahetseng ke C.

7. Sheba setšoantšo se latelang sa boloko!

Boloko bo qoelisoa ka har'a metsi a mabeli a fapaneng. Ha e qoelisoa ka har'a metsi A, 0,6 ea boloko e qoelisoa. Ha e qoelisoa ka har'a metsi B, 0,5 ea boloko e qoelisoa. Karolelano ea bongata ba metsi A le B ke…

K. 1: 1

B. 4: 5

C. 5: 4

D. 5: 6

E. 6: 5

Puisano

Hoa tsebahala hore:

Botenya ba boloko = x

Karolo ea ntho e qoelitsoeng ka har'a metsi A = 0,6

Bongata ba metsi A = y

Karolo ea ntho e qoelitsoeng ka har'a metsi B = 0,5

Botenya ba metsi B = z

Potso: Papiso ea bongata ba metsi A le B (y : z)

Karabo:

Karolo ea ntho e qoelitsoeng ka har'a mokelikeli e lekana le karolelano ea boima ba ntho le boima ba mokelikeli.

Nka sebaka sa x ho equation ea 2 ka x ho equation ea 1 :

Karabo e nepahetseng ke D.

8. Sheba setšoantšo!

Ntho ha e kentswe ka hara metsi a P e phaphamala ka karolo ya 1/2 ya bophahamo ba yona e le ka tlase ho bokahodimo ba metsi mme ha e kentswe ka hara metsi a Q ntho eo e phaphamala. Karolelano ya bongata ba metsi a P le Q ke…

K. 1: 2

B. 2: 1

C. 2: 3

D. 3: 1

E. 3: 4

Puisano

Hoa tsebahala hore:

Botebo ba ntho = x

Karolo ea ntho e qoelitsoeng ka har'a mokelikeli P = 1/2 = 0,5

Bongata ba metsi P = y

Karolo ea ntho e qoelitsoeng ka har'a mokelikeli Q = 1 (likarolo tsohle tsa ntho li qoelitsoe)

Boima ba metsi Q = z

Potso: Papiso ea bongata ba metsi P le Q (y : z)

Karabo:

Karolo ea ntho e qoelitsoeng ka har'a mokelikeli e lekana le karolelano ea boima ba ntho le boima ba mokelikeli.

Nka sebaka sa x ho equation ea 2 ka x ho equation ea 1 :

Karabo e nepahetseng ke B.

9. Sekotwana sa patsi se phaphamala ka hara oli (botenya = 800 kg.m ^-3 ) ho fihlela 4/5 ya bophahamo ba yona e le ka hara oli, ebe botenya ba patsi bo....

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

Puisano

Hoa tsebahala hore:

Boima ba oli ( ρ) = 800 kg.m ^-3

Karolo ea ntho e qoelitsoeng ka metsing = 4/5

E botsitsoe: Botenya ba lehong

Karabo:

Karolo ea ntho e qoelitsoeng e lekana le karolelano ea bongata:

Boima ba patsi ke 640 kg/ ^m3.

Karabo e nepahetseng ke E.

10. Boloko bo moeeng bo boima ba 50 N. Ha bo lekanngoa ka metsing, boima ba bona bo fetoha 30 N. Haeba boima ba metsi = 103 ^kg.m -3 ^, joale boima ba boloko ke...

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

Puisano

Hoa tsebahala hore:

Boima ba boloko moeeng (w) = 50 N

Boima ba boloko ka metsing (bophara ba _metsi ) = 30 N

Boima ba metsi ( ρ _metsi ) = 10 ³ kg.m ^-3 = 1000 kg.m ^-3

Ho potlaka ka lebaka la matla a khoheli (g) = 10 m/s ²

Boima ba boloko moeeng (m) = w/g = 50/10 = 5 kg

Potso: Botenya ba boloko ( ρ _boloko )

Karabo:

Bala matla a ho phaphamala:

F _A = ​​​​w – w _metsi = 50 – 30 = 20 N

Bala bophahamo ba boloko bo qoelitsoeng ka metsing u sebelisa foromo ea matla a ho phaphamala:

F _A = ​​​​ρ g V

20 = (1000)(10) V

20 = (10.000) V

V = 20/10.000

V = 0,002 m ³

Bala bongata ba boloko:

ρ = m/V = 5/0,002 = 2500 kg/m ³

Karabo e nepahetseng ke C.

Khatello ea mokelikeli

11.
Kea leboha! Ho potlaka ho bakoang ke matla a khoheli ke 10 N/kg, haeba sebaka se tšekaletseng sa tlhapi se hatelitsoeng ke metsi a kaholimo ho sona e le 6 cm², joale matla a hatellang tlhapi ho tsoa metsing a ka holimo ho eona ke….

1. 5,1 N
2. 85 N
3. 8500 N
4. 8600 N

Puisano
Hoa tsebahala hore:
Ho potlaka ka lebaka la matla a khoheli (g) = 10 N/kg
Sebaka sa tlhapi se nang le karolo e tšekaletseng (A) = 6 cm² = 6x10^-4 m²
Boima ba metsi = 1 gram/cm³ = 1 (10^-3 kg) / 10^-6 m³ = 10³ kg / m³ = 1000 lik'hilograma / m³
Bophahamo ba metsi = 100 cm – 15 cm = 85 cm = 85 x 10^-2 mitha
O botsitse: Matla a sutumetsang tlhapi ho tsoa metsing a ka holimo ho eona
Karabo:
Karabo e nepahetseng ke A.

Boleng ba capillarity le tsitsipano ea bokaholimo ba metsi

12. Ha lerotholi la mokelikeli le le lenyenyane, sebopeho sa lona se ba haufi le boloko. Bakeng sa bophahamo bo itseng, ho ka pakoa hore boloko bo na le sebaka se senyenyane ka ho fetisisa sa bokaholimo ha se bapisoa le dibopeho tse ding. Khopolo ea lerotholi la mokelikeli le atamela boloko e amana le khopolo ea…

1. Botenya
2. Ho khomarela le ho momahana
3. Khatello ea bokaholimo
4. Meniscus le capillarity

Puisano
Sebopeho se chitja sa marotholi a metsi se amana le mohopolo oa khatello ea bokaholimo. Ho ea ka lipalo, khatello ea bokaholimo ke matla ka bolelele ba yuniti. Matla ao ho buuoang ka 'ona ke ho kopana. Ho kopana ke ho hohela pakeng tsa limolek'hule tse tšoanang, ha ho khomarela ke ho hohela pakeng tsa limolek'hule tse sa tšoaneng.
Matla a matla a kopaneng pakeng tsa limolek'hule tsa metsi le matla a fokolang a khomarelang pakeng tsa limolek'hule tsa metsi le limolek'hule tsa moea kapa limolek'hule tse ling a etsa hore limolek'hule tsohle tsa metsi li hoheloe 'me li bokane. Limolek'hule tsa metsi tse ka har'a lerotholi la metsi li hohela limolek'hule tsa metsi tse ka ntle hore li atamele haufi. Limolek'hule tsa metsi tse ka ntle li na le matla a fokolang a khomarelang kahoo li huloa habonolo hammoho. 'Me sebopeho sa lerotholi la metsi le entsoeng se tšoana le bolo. Ts'ebetsong ena, bokaholimo ba lerotholi la metsi bo bonahala bo tsitsitse ka lebaka la matla a hohelang pakeng tsa limolek'hule tsa metsi.
Karabo e nepahetseng ke C.

13. Ketsahalo ea hore metsi a nyolohele ka har'a tube ea capillary ke hobane...

1. Matla a kgomaretsang pakeng tsa metsi le khalase a kgona ho hula metsi ho ya hodimo
2. matla a kopaneng pakeng tsa metsi le khalase a khona ho hula metsi ho ea holimo
3. boteng ba matla a Archimedes
4. Kgatelelo ya hydrostatic hodima metsi ka hara tube ya capillary e nyane haholo

Puisano
Ho phahama ha metsi ka har'a tube ea capillary ho etsahala hobane matla a khomarelang pakeng tsa limolek'hule tsa metsi le limolek'hule tsa tube ea capillary a maholo ho feta matla a kopaneng pakeng tsa limolek'hule tsa metsi. Ka hona, matla a khomarelang a maholo pakeng tsa limolek'hule tsa metsi le limolek'hule tsa tube ea capillary a khona ho hula metsi holimo.
Chupu ea capillary e ka ba chupu ea khalase, khoele ea setofo, jj.
Karabo e nepahetseng ke A.

Molao oa Boikhohomoso le oa Archimedes

14. Sekepe se tsamayang lewatleng se kena nokeng e pharaletseng le e tebileng. Haeba boima ba metsi a lewatle e le 1100 kg/m3 ^, boima ba metsi a hloekileng ke 1000 kg/m3 ^, joale karolelano ea matla a Archimedes a bonoang ke sekepe leoatleng le nokeng ke….

1. 11: 10
2. 10: 11
3. 121: 100
4. 1: 1

Puisano
Hoa tsebahala hore:
O botsitse: Papiso ea lebotho la Achimedes le fumanoang ke likepe leoatleng le linōkeng
Karabo:
Haeba ntho e phaphamala, matla a ho phaphamala (F)_A) = matla a khoheli (w):
Molao oa Archimedes o re matla a ho phaphamala a sebetsang nthong e qoelitsoeng ka har'a mokelikeli (metsi) a lekana le boima ba mokelikeli (metsi) oo a o tlosang. Bophahamo ba ntho e qoelitsoeng ka har'a mokelikeli (metsi) bo lekana le bophahamo ba mokelikeli (metsi) o tlositsoeng.

Papiso ea bongata ba lintho tse qoelitsoeng metsing a leoatle le metsing a noka:
Karabo e nepahetseng ke B.

15. Sekotwana sa lepolanka se qoelisoa ka metsing. Ho fumaneha hore 25% ea karolo e kaholimo ho metsi 'me 75% e ka metsing. Haeba boima ba metsi e le 1 g/cm3 ^' me lebelo le bakoang ke matla a khoheli e le 10 m/s2 ^, joale boima ba sekotwana sa lepolanka ke….

1. 0,025 lik'hilograma / limithara³
2. 0,075 g / cm³
3. 0,250 lik'hilograma / limithara³
4. 0,750 g / cm³

Puisano
Hoa tsebahala hore:
Karolo ea boloko e ka holim'a metsi = 25% = 25/100 = 0,25
Karolo ea boloko e qoelitsoeng ka metsing = 75% = 75/100 = 0,75
Boima ba metsi = 1 g/cm³ = 1000 lik'hilograma / m³
Ho potlaka ka lebaka la matla a khoheli = 10 m/s²
O botsitse: Botebo ba liboloko tsa lehong
Karabo:
Bophahamo ba boloko bo qoelitsoeng ka metsing = karolelano ea bongata ba boloko le bongata ba metsi
Karabo e nepahetseng ke D.

 

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