Izibonelo Eziyi-9 Zemibuzo Yobuningi
1. Umthamo wento ungama-8 cm 3 kanti isisindo sayo singama-84 amagremu, ngakho-ke ubuningi bayo...
A. 10,5 gr/ cm3
B. 8,5 gr/ cm3
C. 6,4 gr/ cm3
D. 4,8 gr/ cm3
Ingxoxo
Kuyaziwa ukuthi:
Umthamo (V) = 8 cm 3
Isisindo (m) = 84 amagremu
Kubuziwe: Ubuningi ( ρ)
Impendulo:
Ifomula yobuningi :
ρ = m / V = 84 amagremu / 8 cm 3 = 10,5 amagremu/cm 3
Impendulo efanele ngu-A.
2. I-cube yokhuni inomthamo ongu-5 cm 3. Uma ubukhulu bokhuni bungu-250 g/cm 3 , khona-ke ubunzima bokhuni bungu…
A. 1250 g
B. 50 g
C. 10 g
D. 2 g
Ingxoxo
Kuyaziwa ukuthi:
Umthamo wokhuni (V) = 5 cm 3
Ubuningi bokhuni ( ρ ) = 250 g/ cm3
Kubuziwe: Inqwaba yokhuni
Impendulo:
Ifomula yobuningi:
ρ = m / V
Incazelo: ρ = ukuminyana, V = ivolumu, m = isisindo
Isisindo sokhuni:
m = ρ V = (250 g/cm 3 )(5 cm 3 ) = 1250 amagremu
3. Bheka isithombe ohlangothini!
Uma umthamo wamanzi ungama-35 cm 3 kanye nobunzima bento = amagremu angu-60, khona-ke ubuningi bento bungu...
A. 2,40 g/cm
B. 1,71 g/ cm3
C. 1.00 g/ cm3
D. 0,63 g/ cm3
Ingxoxo
Kuyaziwa ukuthi:
Umthamo wamanzi (V) = 35 cm 3
Isisindo sento (m) = amagremu angu-60
Kubuziwe: Ubuningi bento ( ρ )
Impendulo:
Ubuningi:
ρ = m / V = 60/35 = 1,71 amagremu/cm 3
Impendulo efanele ingu-B.
4. I-aluminium yensimbi inesisindo esingamagremu angu-120 kanye nomthamo ongu-60 cm 3 , ngakho-ke ubuningi bayo...
A. 2 gr/ cm3
B. 20 gr/ cm3
C. 200 gr/ cm3
D. 2.000 gr/ cm3
Ingxoxo
Kuyaziwa ukuthi:
Isisindo (m) = 120 amagremu
Umthamo (V) = 60 cm 3
Kubuziwe: Ubuningi
Impendulo:
Ifomula yobuningi:
ρ = m / V
ρ = 120 amagremu / 60 cm 3
ρ = 2 amagremu/ cm3
Impendulo efanele ngu-A.
5. Abafundi abane balinganise izinto, imiphumela yokuhlolwa iboniswe kuthebula elilandelayo:
Abafundi abalinganisa izinto ngezinto ezifanayo…
A. Abafundi A no-B
B. Abafundi B no-C
C. Abafundi B no-D
D. Abafundi C no-D
Ingxoxo
Izinto ezenziwe ngezinto ezifanayo zinobukhulu noma isisindo esifanayo. Ngokuphambene nalokho, izinto ezenziwe ngezinto ezahlukene zinobukhulu obuhlukile.
Ifomula yobuningi yile:
ρ = m / V
Incazelo: ρ = ukuminyana, m = isisindo, V = ivolumu
Impendulo efanele ingu-B.
6. Bheka umdwebo wokulinganisa usebenzisa izinto namathuluzi alandelayo! Uma isisindo sento singamagremu angu-300, khona-ke ubuningi bento bungu...
A. 3,0 g/cm3
B. 7,5 g/ cm3
C. 15 g/ cm3
D. 320 g/ cm3
Ingxoxo
Kuyaziwa ukuthi:
Isisindo sento (m) = amagremu angu-300
Umthamo wento (V) = umthamo wamanzi achithekile = 20 cm 3
Kubuziwe: Ubuningi bento
Impendulo:
Ifomula yobuningi:
ρ = m / V = 300 amagremu / 20 cm 3 = 15 amagremu/cm 3
Impendulo efanele ngu-C.
7. Bheka isithombe!
Uma into enesisindo esingamagremu angu-316 ifakwa ebhavini eligcwele amanzi njengoba kuboniswe esithombeni, khona-ke ubuningi bento bu...
A. 7,9 kg/m3
B. 15,8 kg/ m3
C. 7.900 kg/ m3
D. 15.800 kg/ m3
Ingxoxo
Kuyaziwa ukuthi:
Isisindo sento (m) = amagremu angu-316
Umthamo wento (V) = umthamo wamanzi achithekile = amamililitha angu-40
Kubuziwe: Ubuningi bento
Impendulo:
Ngaphambi kokubala ubuningi, qala ngokuguqula amayunithi obunzima kanye nomthamo wento.
Isisindo sento = 316 amagremu = 316/1000 kg = 0,316 kg
Umthamo wento = 40 milliliters = 40/1000 litres = 4/100 litres = 0,04 litres
Ilitha eli-1 = i-cubic decimeter e-1 (dm 3 ) = i-cubic meter eyi-1/1000 (m 3 ) = 0,001 m 3
0,04 ilitha = (0,04)(0,001) m 3 = 0,00004 m 3
Ubuningi bento:
ρ = m / V = 0,316 kg / 0,00004 m 3 = 316 kg / 0,04 m 3 = 7900 kg/m 3
Impendulo efanele ngu-C.
8. Bheka isithombe esilandelayo sokulinganisa!
Ubuningi bedwala ngokwemininingwane esezithombeni (Umfanekiso 1) kanye (Umfanekiso 2)
A. 6.000 kg/ m3
B. 4.000 kg/ m3
C. 2.400 kg/ m3
D. 670 kg/ m3
Ingxoxo
Kuyaziwa ukuthi:
Yisho wonke amayunithi ohlelweni lwamazwe ngamazwe
Isisindo setshe (m) = amagremu ayi-100 + amagremu angama-20 = amagremu ayi-120 = 120 / 1000 kilograms = 0,120 kilograms
Umthamo wetshe (V) = umthamo wamanzi asusiwe = amamililitha angu-80 – amamililitha angu-60 = amamililitha angu-20 = 20/1000 amalitha = 2/100 amalitha = 0,02 amalitha
Ilitha eli-1 = i-cubic decimeter e-1 (dm 3 ) = i-cubic meter eyi-1/1000 (m 3 ) = 0,001 m 3
Amalitha angu-0,02 = 0,02 x 0,001 m 3 = 0,00002 m 3
Kubuziwe: Ubuningi bedwala
Impendulo:
Ubuningi bedwala:
ρ = m / V = 0,120 kg / 0,00002 m 3 = 120 kg / 0,02 m 3 = 6000 kg/m 3
Impendulo efanele ngu-A.
9. USusi, umfundi webanga lesi-7, wanikwa umsebenzi nguthisha wakhe wokunquma uhlobo lwento uM. USusi walinganisa isisindo kanye nomthamo wento esebenzisa amathuluzi aboniswe esithombeni.
Ngokusekelwe emiphumeleni yokulinganiswa kwezinto kanye nokuhambisana kobuningi obusetafuleni, uhlobo lwento elinganiswayo lu...
A. I-Aluminium
B. I-Zinc
C. Insimbi
D. Kuningan
Ingxoxo
Zonke izingxenye zibonakaliswa ohlelweni lwamazwe ngamazwe
Kuyaziwa ukuthi:
Isisindo sento M (m) = 168 amagremu = 168/1000 amakhilogremu = 0,168 amakhilogremu
Umthamo wento M (V) = umthamo wamanzi asusiwe = 80 ml – 60 ml = 20 milliliters = 20/1000 litres = 2/100 litres = 0,02 litres
Ilitha eli-1 = i-cubic decimeter e-1 (dm 3 ) = i-cubic meter eyi-1/1000 (m 3 ) = 0,001 m 3
Amalitha angu-0,02 = 0,02 x 0,001 m 3 = 0,00002 m 3
Kubuziwe: Ubuningi bento
Impendulo:
Ubuningi bento buyi:
ρ = m / V = 0,168 kg / 0,00002 m 3 = 168 kg / 0,02 m 3 = 8400 kg/m 3
Ngokusekelwe kuthebula lobuningi, into enobukhulu obungu-8400 kg/m3 iyithusi.
Impendulo efanele ngu-D.
Umthombo wombuzo:
Imibuzo Yokuhlolwa Kazwelonke Yesayensi Yesikole Samabanga Aphansi/Isikole SamaSulumane Samabanga Aphakeme
