Ubuningi - izinkinga nezixazululo

Ubuningi - izinkinga nezixazululo

1. Umthamo wento ungama-8 cm ³ kanti isisindo sento singama-84 amagremu. Kuyini ubuningi bento?

Kwaziwa:

Umthamo (V) = 8 cm ³

Isisindo (m) = amagremu angu-84

Okufunwayo: ubuningi (ρ)

Isixazululo:

ρ = m / V = ​​​​84 amagremu / 8 cm ³ = 10.5 amagremu/cm ³

2. Umthamo webhulokhi ungama-5 cm ^3. Uma ubukhulu bebhulokhi bungama-250 g/cm ³ , buyini ubunzima bebhulokhi?

Kwaziwa:

Umthamo (V) = 5 cm ³

Ubuningi (ρ) = 250 g/ ^cm3

Okufunwayo: Isisindo sebhulokhi

Isixazululo:

ρ = m / V

ρ = ubuningi, V = ivolumu, m = isisindo

Isisindo sebhulokhi:

m = ρ V = (250 g/cm ³ )(5 cm ³ ) = 1250 amagremu

3. Umthamo wamanzi ungama-35 cm ³ kanti isisindo samanzi singamagremu angu-60, kungakanani ubuningi bamanzi.

Kwaziwa:

Umthamo wamanzi (V) = 35 cm ³

Isisindo samanzi (m) = 60 amagremu

Okufunwayo: ubuningi (ρ)

Isixazululo:

ukuminyana:

ρ = m / V = ​​​​60/35 = 1.71 amagremu/cm ³

4. Isisindo sensimbi singamagremu ayi-120 kanti ivolumu yensimbi ingu-60 cm ^3. Kuyini ubuningi bensimbi?

Kwaziwa:

Isisindo (m) = amagremu angu-120

Umthamo (V) = 60 cm ³

Okufunwayo: ubuningi

Isixazululo:

ρ = m / V

ρ = 120 amagremu / 60 cm ³

ρ = 2 amagremu/ ^cm3

5.

Ngokusekelwe kuthebula, into enobuningi obufanayo…

Isixazululo:

Ifomula yobuningi:

ρ = m / V

ρ = ubuningi, m = isisindo, V = ivolumu

6. Ngokusekelwe esithombeni esingezansi, uma isisindo sento singamagremu angu-300, kungakanani ubuningi bento.

Kwaziwa:

Isisindo (m) = amagremu angu-300

Umthamo (V) = umthamo wamanzi achithekile = 20 cm ³

Okufunwayo: ubuningi

Isixazululo:

ρ = m / V = ​​​​300 amagremu / 20 cm ³ = 15 amagremu/cm ³

7. Isisindo sento singamagremu angu-316, sibekwe esitsheni njengoba kuboniswe esithombeni. Kuyini ubuningi bento.

Kwaziwa:

Isisindo (m) = amagremu angu-316

Umthamo (V) = umthamo wamanzi achithekile = 40 ml

Okufunwayo: ubuningi

Isixazululo:

Isisindo = 316 amagremu = 316/1000 kg = 0.316 kg

Umthamo = 40 ml = 40/1000 amalitha = 4/100 amalitha = 0.04 amalitha

Ilitha eli-1 = 1 dm ³ = 1/1000 m ³ = 0.001 m ³

0.04 amalitha = (0.04)(0.001) m ³ = 0.00004 m ³

Ubuningi:

ρ = m / V = ​​0.316 kg / 0.00004 m ³ = 316 kg / 0.04 m ³ = 7900 kg/m ³

8.

Ubuningi betshe ngokusekelwe esithombeni bungu…

Kwaziwa:

Isisindo (m) = amagremu ayi-100 + amagremu angama-20 = amagremu ayi-120 = 120 / 1000 kilograms = 0.120 kilograms

Umthamo (V) = 80 ml – 60 ml = 20 ml = 20/1000 amalitha = 2/100 amalitha = 0.02 amalitha

Ilitha eli-1 = 1 dm ³ = 1/1000 m ³ = 0.001 m ³

Amalitha angu-0.02 = 0.02 x 0.001 m ³ = 0.00002 m ³

Okufunwayo: ubuningi

Isixazululo:

Ubuningi:

ρ = m / V = ​​0.120 kg / 0.00002 m ³ = 120 kg / 0.02 m ³ = 6000 kg/m ³

1. Kuyini ukuminyana?
   • ImpenduloUbuningi buyindlela yokulinganisa ukuthi buningi kangakanani ubunzima obuqukethwe kuvolumu ethile. Kubalwa ngokuhlukanisa ubunzima bento ngevolumu yayo: Ubuningi = Ubuningi / UmthamoUbuningi=ivolumuImisa​.
2. Ubuningi bento buhlobene kanjani nekhono layo lokuntanta noma lokucwila oketshezini?
   • ImpenduloIzinto ezinobukhulu obukhulu kunoketshezi zizocwila, kuyilapho izinto ezinobukhulu obungaphansi koketshezi zizontanta.
3. Kungani ezinye izinto ezibonakala zinkulu, njengomkhumbi omkhulu, zintanta emanzini?
   • Impendulo: Konke kumayelana nomthamo osusiwe. Umkhumbi, nakuba usinda, unesimo esisusa umthamo omkhulu wamanzi. Uma isisindo samanzi asusiwe sikhulu noma silingana nesisindo somkhumbi, umkhumbi uzontanta.
4. Izinga lokushisa livame ukuthinta kanjani ubuningi bento ethile?
   • Impendulo: Ngokuvamile, njengoba izinga lokushisa likhuphuka, ubuningi bento buyancipha ngoba ama-molecule ahamba kakhulu futhi avame ukuthatha ivolumu enkulu. Kunezimo ezihlukile, njengokwanda okungavamile kwamanzi ngaphansi kuka-4°C.
5. Kubaluleke ngani ukuminyana kwamanzi? 1 g / cm³?
   • Impendulo: Inani lokuminyana kwe 1g / cm³ ngoba amanzi ayisilinganiso esilula. Izinto ezinobukhulu obukhulu kunalokhu zizocwila emanzini, kuyilapho lezo ezinobukhulu obuncane zizontanta.
6. Kungani izinto ezimbili zingaba nobunzima obufanayo kodwa zibe nobukhulu obuhlukile?
   • Impendulo: Lezi zinto ezimbili zingenziwa ngezinto ezahlukene (futhi ngaleyo ndlela zibe nezakhiwo zama-athomu noma zama-molecule ahlukene) noma zingaba namavolumu ahlukene. Into enomthamo omkhulu kanye nobunzima obufanayo nento encane izoba nobuningi obuphansi.
7. Ukucindezela igesi kuthinta kanjani ubuningi bayo?
   • Impendulo: Ukucindezela igesi kunciphisa ivolumu yayo. Njengoba isisindo sihlala singaguquguquki, ukunciphisa ivolumu kuzokwandisa ubuningi begesi.
8. Kungani ezinye izinsimbi ezisindayo, njenge-lead, zizizwa “zinzima” kunezinye ezinobukhulu obufanayo?
   • Impendulo: “Ubunzima” obuzwayo empeleni yi-density. I-lead inobukhulu obukhulu kunezinye izinsimbi eziningi, ngakho-ke ucezu lwe-lead luzizwa lukhuni kunenye insimbi enomthamo ofanayo.
9. Into ingaba kanjani lukhuni kunoketshezi kodwa ingacwili ngokushesha uma ibekwa ebusweni boketshezi?
   • Impendulo: Ukucindezeleka kobuso ngezinye izikhathi kungasekela izinto ezixinene kakhulu kunoketshezi, ikakhulukazi uma into incane noma inesimo esingabekwa “esibekwe” ubuso boketshezi. Nokho, ngokuhamba kwesikhathi, uma ubukhulu bento bukhulu, cishe izocwila.
10. Ingabe ubuningi bento efanayo bungahluka ezindaweni ezahlukene ngaphakathi kwento?

• Impendulo: Cha. Entweni efanayo, ubuningi buyafana kuyo yonke indawo, okusho ukuthi inenani elifanayo kuzo zonke izindawo ngaphakathi kwento.