Kuwanda kwevanhu uye kuenzana kwezvinhu - matambudziko nemhinduro

Kuwanda kwevanhu uye kuenzana kwezvinhu - matambudziko nemhinduro

1. Chivharo chakaiswa muzvinwiwa zviviri zvine mhando dzakasiyana. Muzvinwiwa A, 0.6 chikamu chechinhu chiri mumvura. Muzvinwiwa B, 0.5 chikamu chechinhu chiri mumvura. Sarudza chiyero chehuwandu hwemvura A kune mvura B.

Zvinozivikanwa:

Kuwanda kwebhuroko = x

Chikamu chechinhu chiri mumvura A = 0.6

Kuwanda kwemvura A = y

Chikamu chechinhu chiri mumvura B = 0.5

Kuwanda kwemvura B = z

Zvinodiwa: Chiyero chehuwandu hwemvura A kune mvura B (y:z)

Solution:

Isa x muequation 2 na x muequation 1:

2. Chinhu chakaiswa mumvura P, chikamu che0.5 chechinhu chacho chinenge chiri mumvura. Kana chinhu chacho chikaiswa mumvura Q, chinhu chacho chinenge chiri mumvura, sezvakaratidzwa mumufananidzo uri pazasi. Ndeipi chiyero chehuwandu hwemvura P neQ?

Zvinozivikanwa:

Kuwanda kwechinhu = x

Chikamu chechinhu chiri mumvura P = 1/2 = 0.5

Kuwanda kwemvura P = y

Chikamu chechinhu chiri mumvura Q = 1

Kuwanda kwemvura Q = z

Zvinodiwa: Chiyero chehuwandu hwemvura P kune mvura Q (y: z)

Solution:

Isa x muequation 2 na x muequation 1:

3. Huni dziri mumafuta (huwandu hwemafuta i800 kg/m3 ⁾ . Zvikamu zvina neshanu zvehuni zviri mumafuta . Huwandu hwehuni hwakaita sei?

Zvinozivikanwa:

Kuwanda kwemafuta (ρ) = 800 kg/m ^-3

Chikamu chehuni mumafuta = 4/5

Zvinodiwa: Huni dzakakora

Solution:

Kuwanda kwehuni i640 kg/ ^m3.

4. Huremu hwebhuroko i50 N. Mumvura, huremu hwebhuroko i30 N. Kana huwandu hwemvura huri 10 ³ kg/m ^-3 huwandu hwebhuroko chii.

Zvinozivikanwa:

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 (m) = w/g = 50/10 = 5 kg

Zvinodiwa: Kuwanda kwemabhuroko (ρ _mabhuroko )

Solution:

Simba rinosimudzira:

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

Huwandu hwebhuroko mumvura:

F _A = ​​​​ρ g V

20 = (1000)(10) V

20 = (10,000) V

V = 20/10,000

V = 0.002 m ³

Kuwanda kwebhuroko:

ρ = m/V = 5 / 0.002 = 2500 kg/m ³

5. Chivharo chehuni chakanyikwa mumvura. 25% yezvikamu zvayo zviri pamusoro pemvura uye 75% zviri mumvura. Kuwanda kwemvura i1 g/cm3 ^uye kukurumidza nekuda kwegiravhiti i10 m/s2 ^. Sarudza huwandu hwemabhuroko.

A. 0.025 kg/ ^m3

B. 0.075 g/ ^cm3

C. 0.250 kg/ ^m3

D. 0.750 g/ ^cm3

Zvinozivikanwa:

Chikamu chezvivharo zviri pamusoro pemvura = 25% = 25/100 = 0.25

Chikamu chebhuroko mumvura = 75% = 75/100 = 0.75

Kuwanda kwemvura (ρ _mvura ) = 1 g/cm3 ⁼ 1000 kg/ ^m3

Kukurumidza kunokonzerwa negiravhiti = 10 m/s ²

Zvinodiwa: Kuwanda kwemabhuroko (ρ _mabhuroko )

Solution:

Huwandu hwemabhuroko mumvura = chiyero chehuwandu hwemabhuroko nehuremu hwemvura

Mhinduro chaiyo ndiD.

1. Chii chinonzi density, uye inotsanangurwa sei nemasvomhu?
   • Pindura: Kuwanda kwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu hwehuwandu. Panyaya yemasvomhu, hunotsanangurwa se kuwanda =uwandu/huwandu​.
2. Kuwanda kwechinhu kunoratidza sei kana chichiyangarara kana kunyura mumvura?
   • Pindura: Kana huwandu hwechinhu huri pasi pehuwandu hwemvura yachinoiswa, chinhu chinoyangarara. Kusiyana neizvi, kana huwandu hwechinhu hwacho hwakakura kupfuura huwandu hwemvura, chinonyura.
3. Ndeipi pfungwa iri shure kwekunyura kana kunyura kwechinhu mumvura?
   • Pindura: Nheyo yacho ipfungwa yaArchimedes, iyo inotaura kuti muviri unonyudzwa muchiitiko chemvura inoyerera yesimba rinokwira rakaenzana nehuremu hwemvura yaunobvisa.
4. Kana chidimbu chechando chikayangarara mumvura chikamu chayo chiri pamusoro pemvura, izvi zvinoratidzei nezvekuwanda kwechando nemvura?
   • Pindura: Izvi zvinoratidza kuti huwandu hwechando hwakaderera pane huwandu hwemvura. Ndosaka chando chichiyangarara, uye chikamu chacho chete ndicho chinosara chakanyura mumvura kuti chibvise huwandu hwemvura hwakaenzana nehuremu hwechando.
5. Sei ngarava dzesimbi dzinorema dzichiyangarara pamusoro pemvura nepo chipikiri chidiki chesimbi chinganyura?
   • Pindura: Kuwanda kwengarava yesimbi, kusanganisira nzvimbo dzayo dzine maburi dzakazadzwa nemhepo, kushoma pane kuwanda kwemvura. Kusiyana neizvi, kuwanda kwembambo yesimbi yakasimba kwakakura kupfuura kuwanda kwemvura, zvichiita kuti inyure.
6. Pfungwa yekuti "kusafamba-famba" yakasiyana sei nekuyangarara kana kunyura?
   • Pindura: Kudzika kwemvura kunoitika kana huremu hwechinhu hwakaenzana nesimba rinodzika, zvichiita kuti chinhu chirambe chakarembera mumvura pasina kukwira kana kunyura.
7. Sei bharumu rehelium richiyangarara mudenga?
   • Pindura: Kuwanda kwehelium kwakaderera zvakanyanya pane kuwanda kwemhepo. Nekuda kweizvozvo, huremu hwebharumu rehelium (kusanganisira zvinhu zvebharumu nehelium iri mukati) hushoma pane huremu hwemhepo yainobvisa, zvichiita kuti iyangarare.
8. Chii chinoitika kuhuwandu hwechinhu kana chikamanikidzwa kuita vhoriyamu diki asi huremu hwacho huchiramba hwakafanana?
   • Pindura: Kuwanda kwehuwandu huchawedzera sezvo huwandu hunotsanangurwa sehukuru hwakakamurwa nehukuru. Kana huwandu hukadzikira uye huremu hukaramba hwakafanana, chiyero (huwandu) chichawedzera.
9. Kuwanda kwemunyu kunokanganisa sei kuwanda kwemvura?
   • Pindura: Kuwedzera munyu mumvura (kureva, kuwedzera munyu) kuchawedzera huwandu hwayo. Ndosaka zvinhu zvichinyanya kuyerera zviri nyore mumvura ine munyu (seGungwa Rakafa) zvichienzaniswa nemvura yakachena.
10. Kana chinhu chiri kuyerera muchimiro chemvura, simba rinoyerera uye simba rinokwevera zvinhu pasi rinoenzaniswa sei?

• Pindura: Kana chinhu chiri kuyangarara zvakaenzana, simba rinoyangarara (simba rinokwira nekuda kwemvura) rakaenzana muhukuru uye rakapesana nesimba rinokwevera pasi (huremu) rinoshanda pachinhu chacho.