Zitsanzo 9 za Mafunso Okhudzana ndi Kuchuluka kwa Anthu
1. Kuchuluka kwa chinthu ndi 8 cm 3 ndipo kulemera kwake ndi magalamu 84, kotero kuchuluka kwake ndi...
A. 10,5 gr/ cm3
B. 8,5 gr/ cm3
C. 6,4 gr/ cm3
D. 4,8 gr/ cm3
Zokambirana
Amadziwika kuti:
Voliyumu (V) = 8 cm 3
Kulemera (m) = magalamu 84
Yafunsidwa: Kuchulukana ( ρ )
Yankho:
Fomula yochulukira :
ρ = m / V = 84 magalamu / 8 cm 3 = 10,5 magalamu/cm 3
Yankho lolondola ndi A.
2. Chidutswa cha matabwa chimakhala ndi voliyumu ya 5 cm 3. Ngati kuchuluka kwa matabwa ndi 250 g/cm 3 , ndiye kuti kulemera kwa matabwa ndi…
A. 1250 g
B. 50 g
C. 10 g
D. 2 g
Zokambirana
Amadziwika kuti:
Kuchuluka kwa matabwa (V) = 5 cm 3
Kuchuluka kwa matabwa ( ρ ) = 250 g/ cm3
Anafunsa: Unyinji wa matabwa
Yankho:
Fomula ya kachulukidwe:
ρ = m / V
Kufotokozera: ρ = kuchuluka, V = voliyumu, m = kulemera
Mtengo wa matabwa:
m = ρ V = (250 g/cm 3 )(5 cm 3 ) = 1250 magalamu
3. Yang'anani chithunzi chomwe chili pambali!
Ngati voliyumu ya madzi ndi 35 cm 3 ndipo kulemera kwa chinthucho = 60 magalamu, ndiye kuti kuchuluka kwa chinthucho ndi...
A. 2,40 g/cm
B. 1,71 g/ cm3
C. 1.00 g/ cm3
D. 0,63 g/ cm3
Zokambirana
Amadziwika kuti:
Kuchuluka kwa madzi (V) = 35 cm 3
Kulemera kwa chinthu (m) = magalamu 60
Yafunsidwa: Kuchuluka kwa chinthucho ( ρ )
Yankho:
Kuchulukana:
ρ = m / V = 60/35 = 1,71 magalamu/cm 3
Yankho lolondola ndi B.
4. Chitsulo cha aluminiyamu chili ndi kulemera kwa magalamu 120 ndi voliyumu ya 60 cm 3 , kotero kuchuluka kwake ndi...
A. 2 gr/ cm3
B. 20 gr/ cm3
C. 200 gr/ cm3
D. 2.000 gr/ cm3
Zokambirana
Amadziwika kuti:
Kulemera (m) = magalamu 120
Voliyumu (V) = 60 cm 3
Anafunsa: Kuchulukana
Yankho:
Fomula ya kachulukidwe:
ρ = m / V
ρ = 120 magalamu / 60 cm 3
ρ = 2 magalamu/ cm3
Yankho lolondola ndi A.
5. Ophunzira anayi anayeza zinthu, zotsatira za kuyeseraku zawonetsedwa mu tebulo ili:
Ophunzira omwe amayesa zinthu ndi chinthu chomwecho ndi…
A. Ophunzira A ndi B
B. Ophunzira B ndi C
C. Ophunzira B ndi D
D. Ophunzira C ndi D
Zokambirana
Zinthu zopangidwa ndi chinthu chomwecho zimakhala ndi kulemera kofanana. Mosiyana ndi zimenezi, zinthu zopangidwa ndi zinthu zosiyanasiyana zimakhala ndi kulemera kosiyana.
Fomula ya kuchulukana ndi iyi:
ρ = m / V
Kufotokozera: ρ = kachulukidwe, m = kulemera, V = voliyumu
Yankho lolondola ndi B.
6. Yang'anani chithunzi choyezera pogwiritsa ntchito zipangizo ndi zida zotsatirazi! Ngati kulemera kwa chinthu ndi magalamu 300, ndiye kuti kuchuluka kwa chinthucho ndi...
A. 3,0 g/cm3
B. 7,5 g/ cm3
C. 15 g/ cm3
D. 320 g/ cm3
Zokambirana
Amadziwika kuti:
Kulemera kwa chinthu (m) = magalamu 300
Kuchuluka kwa chinthu (V) = kuchuluka kwa madzi otayika = 20 cm 3
Anafunsa: Kuchuluka kwa chinthucho
Yankho:
Fomula ya kachulukidwe:
ρ = m / V = 300 magalamu / 20 cm 3 = 15 magalamu/cm 3
Yankho lolondola ndi C.
7. Yang'anani chithunzicho!
Ngati chinthu cholemera magalamu 316 chiyikidwa mu chidebe chodzaza ndi madzi monga momwe chithunzichi chikusonyezera, ndiye kuti kuchuluka kwa chinthucho ndi...
A. 7,9 kg/m23
B. 15,8 kg/ m3
C. 7.900 kg/ m3
D. 15.800 kg/ m3
Zokambirana
Amadziwika kuti:
Kulemera kwa chinthu (m) = magalamu 316
Kuchuluka kwa chinthu (V) = kuchuluka kwa madzi otayika = 40 milliliters
Anafunsa: Kuchuluka kwa chinthucho
Yankho:
Musanawerenge kuchuluka kwa zinthu, choyamba sinthani mayunitsi a kulemera ndi kuchuluka kwa chinthucho.
Kulemera kwa chinthu = 316 magalamu = 316/1000 kg = 0,316 kg
Kuchuluka kwa chinthu = 40 milliliters = 40/1000 malita = 4/100 malita = 0,04 malita
Lita imodzi = 1 kiyubiki decimeter (dm 3 ) = 1/1000 kiyubiki mita (m 3 ) = 0,001 m 3
0,04 lita = (0,04)(0,001) m 3 = 0,00004 m 3
Kuchuluka kwa chinthucho:
ρ = m / V = 0,316 kg / 0,00004 m 3 = 316 kg / 0,04 m 3 = 7900 kg/m 3
Yankho lolondola ndi C.
8. Yang'anani chithunzi chotsatirachi choyezera!
Kuchuluka kwa thanthwe malinga ndi deta yomwe ili muzithunzi (Chithunzi 1) ndi (Chithunzi 2)
A. 6.000 kg/ m3
B. 4.000 kg/ m3
C. 2.400 kg/ m3
D. 670 kg/ m3
Zokambirana
Amadziwika kuti:
Lembani magawo onse mu International System
Unyinji wa miyala (m) = magalamu 100 + magalamu 20 = magalamu 120 = 120 / makilogalamu 1000 = 0,120 kilogalamu
Kuchuluka kwa miyala (V) = kuchuluka kwa madzi osunthika = 80 milliliters – 60 milliliters = 20 milliliters = 20 / 1000 liters = 2/100 liters = 0,02 liters
Lita imodzi = 1 kiyubiki decimeter (dm 3 ) = 1/1000 kiyubiki mita (m 3 ) = 0,001 m 3
Malita 0,02 = 0,02 x 0,001 m 3 = 0,00002 m 3
Anafunsa: Kuchuluka kwa thanthwe
Yankho:
Kuchuluka kwa miyala:
ρ = m / V = 0,120 kg / 0,00002 m 3 = 120 kg / 0,02 m 3 = 6000 kg/m 3
Yankho lolondola ndi A.
9. Susi, wophunzira wa giredi 7, anapatsidwa ntchito ndi mphunzitsi wake kuti adziwe mtundu wa chinthu M. Susi anayeza kulemera ndi kuchuluka kwa chinthucho pogwiritsa ntchito zida zomwe zawonetsedwa pachithunzichi.
Kutengera zotsatira za muyeso wa chinthucho ndi kufanana kwa kuchuluka kwa zinthu zomwe zili patebulo, mtundu wa chinthu chomwe chikuyesedwa ndi...
A. Aluminiyamu
B. Zinki
C. Chitsulo
D. Kuningan
Zokambirana
Mayunitsi onse afotokozedwa mu International System
Amadziwika kuti:
Kulemera kwa chinthu M (m) = 168 magalamu = 168/1000 makilogalamu = 0,168 makilogalamu
Kuchuluka kwa chinthu M (V) = kuchuluka kwa madzi osunthika = 80 ml - 60 ml = 20 milliliters = 20/1000 malita = 2/100 malita = 0,02 malita
Lita imodzi = 1 kiyubiki decimeter (dm 3 ) = 1/1000 kiyubiki mita (m 3 ) = 0,001 m 3
Malita 0,02 = 0,02 x 0,001 m 3 = 0,00002 m 3
Anafunsa: Kuchuluka kwa chinthucho
Yankho:
Kuchuluka kwa chinthu ndi:
ρ = m / V = 0,168 kg / 0,00002 m 3 = 168 kg / 0,02 m 3 = 8400 kg/m 3
Kutengera ndi tebulo la kuchulukana, chinthu chomwe chili ndi kuchulukana kwa 8400 kg/m3 ndi mkuwa.
Yankho lolondola ndi D.
Gwero la funso:
Mafunso a Mayeso a Sayansi ya Sukulu ya Sekondale/Chisilamu cha Sukulu ya Sekondale
