Cufnaanta - dhibaatooyinka iyo xalalka
1. Mugga walaxdu waa 8 cm 3 , cufnaanta walaxduna waa 84 garaam. Waa maxay cufnaanta walaxda?
La yaqaan:
Mugga (V) = 8 cm 3
Cufnaanta (m) = 84 garaam
La rabay: cufnaanta (ρ)
Xalka:
ρ = m / V = 84 garaam / 8 cm 3 = 10.5 garaam/cm 3
2. Mugga balooggu waa 5 cm 3. Haddii cufnaanta balooggu tahay 250 g/cm 3 , waa maxay cufnaanta baloogga?
La yaqaan:
Mugga (V) = 5 cm 3
Cufnaanta (ρ) = 250 g/cm 3
La Raadiyay: Cufka baloogga
Xalka:
ρ = m / V
ρ = cufnaanta, V = mugga, m = cufnaanta
Cufnaanta baloogga:
m = ρ V = (250 g/cm 3 )(5 cm 3 ) = 1250 garaam
3. Mugga biyuhu waa 35 cm 3 , cufka biyuhuna waa 60 garaam, waa maxay cufnaanta biyuhu.
La yaqaan:
Mugga biyaha (V) = 35 cm 3
Cufka biyaha (m) = 60 garaam
La rabay: cufnaanta (ρ)
Xalka:
cufnaanta:
ρ = m / V = 60/35 = 1.71 garaam/cm 3
4. Cufka birta waa 120 garaam mugga birtana waa 60 cm 3. Waa maxay cufnaanta birta?
La yaqaan:
Cufnaanta (m) = 120 garaam
Mugga (V) = 60 cm 3
La rabay: cufnaanta
Xalka:
ρ = m / V
ρ = 120 garaam / 60 cm 3
ρ = 2 garaam/cm 3
5.
Iyada oo ku saleysan jadwalka, shay leh cufnaan isku mid ah waa…
Xalka:
Qaacidada cufnaanta:
ρ = m / V
ρ = cufnaanta, m = cufnaanta, V = mug
6. Iyada oo ku saleysan sawirka hoose, haddii cufka walaxdu yahay 300 garaam, waa maxay cufnaanta walaxda.
La yaqaan:
Cufnaanta (m) = 300 garaam
Mugga (V) = mugga biyaha daatay = 20 cm 3
La rabay: cufnaanta
Xalka:
ρ = m / V = 300 garaam / 20 cm 3 = 15 garaam/cm 3
7. Cufka shaygu waa 316 garaam, oo lagu riday weel sida ku cad sawirka. Waa maxay cufnaanta shayga.
La yaqaan:
Cufnaanta (m) = 316 garaam
Mugga (V) = mugga biyaha daatay = 40 ml
La rabay: cufnaanta
Xalka:
Cufnaanta = 316 garaam = 316/1000 kg = 0.316 kg
Mugga = 40 ml = 40/1000 litir = 4/100 litir = 0.04 litir
1 litir = 1 dm 3 = 1/1000 m 3 = 0.001 m 3
0.04 litir = (0.04)(0.001) m 3 = 0.00004 m 3
Cufnaanta:
ρ = m / V = 0.316 kg / 0.00004 m 3 = 316 kg / 0.04 m 3 = 7900 kg/m 3
8.
Cufnaanta dhagaxa ee ku salaysan sawirka waa…
La yaqaan:
Cufnaanta (m) = 100 garaam + 20 garaam = 120 garaam = 120 / 1000 kiilo garaam = 0.120 kiilo garaam
Mugga (V) = 80 ml – 60 ml = 20 ml = 20 / 1000 litir = 2/100 litir = 0.02 litir
1 litir = 1 dm 3 = 1/1000 m 3 = 0.001 m 3
0.02 litir = 0.02 x 0.001 m 3 = 0.00002 m 3
La rabay: cufnaanta
Xalka:
Cufnaanta:
ρ = m / V = 0.120 kg / 0.00002 m 3 = 120 kg / 0.02 m 3 = 6000 kg/m 3
- Waa maxay cufnaanta?
- JawaabCufnaanta waa cabbir lagu cabbiro inta cuf ee ku jira mug la bixiyay. Waxaa lagu xisaabiyaa iyadoo loo qaybinayo cufka shay muggiisa: Cufnaanta = Cufnaanta / Mugga.
- Sidee cufnaanta shaygu ula xiriirtaa awooddiisa uu ku dul sabeyn karo ama ugu degi karo dareere?
- Jawaab: Walxaha cufnaanta ka weyn dareeraha ayaa quusi doona, halka walxaha cufnaanta ka yar dareeraha ay dul sabeyn doonaan.
- Maxay walxo u muuqda kuwo waaweyn, sida markab weyn, ugu sabeeyaan biyaha?
- Jawaab: Waxay ku saabsan tahay mugga la barakiciyay. Markabku, inkastoo uu culus yahay, wuxuu leeyahay qaab baabi'iya mugga biyaha badan. Haddii miisaanka biyaha la barakiciyay uu ka badan yahay ama la mid yahay miisaanka markabka, markabku wuu sabeyn doonaa.
- Sidee buu heerkulku caadi ahaan u saameeyaa cufnaanta walaxda?
- Jawaab: Guud ahaan, marka heerkulku kordho, cufnaanta walaxdu way yaraataa sababtoo ah molecules-ku way dhaqaaqaan waxayna u muuqdaan inay qabsadaan mug weyn. Waxaa jira waxyaabo ka reeban, sida ballaarinta aan caadiga ahayn ee biyaha ka hooseeya 4°C.
- Waa maxay muhiimadda cufnaanta biyuhu leedahay ?
- JawaabQiimaha cufnaanta ee waayo biyuhu waa halbeeg ku habboon. Walxaha leh cufnaanta ka weyn tan waxay ku quusi doonaan biyaha, halka kuwa cufnaanta ka yar ay dul sabeyn doonaan.
- Maxay laba shay u yeelan karaan cufnaan isku mid ah laakiin kala duwan?
- Jawaab: Labada shay waxaa laga samayn karaa walxo kala duwan (sidaas darteedna waxay yeelan karaan qaab-dhismeedyo atomi ama molecular oo kala duwan) ama waxay yeelan karaan mugyo kala duwan. Shay leh mug weyn iyo cufnaan la mid ah shay yar wuxuu yeelan doonaa cufnaan hoose.
- Sidee buu cadaadiska gaaska u saameeyaa cufnaantiisa?
- Jawaab: Cadaadiska gaaska wuxuu yareeyaa mugga gaaska. Maadaama cufku uu yahay mid joogto ah, yaraynta mugga waxay kordhin doontaa cufnaanta gaaska.
- Maxay biraha qaarkood, sida rasaasta, u dareemaan "culus" marka loo eego kuwa kale ee isku cabbirka ah?
- Jawaab: "Culayska" aad dareemayso waa cufnaanta dhabta ah. Rasaasta waxay leedahay cufnaan ka badan biraha kale ee badan, sidaa darteed gabal rasaas ah wuxuu dareemayaa inuu ka culus yahay bir kale oo isku mug ah.
- Sidee bay shay uga cufnaan kartaa dareeraha laakiin uusan isla markiiba quusin marka la saaro dusha sare ee dareeraha?
- JawaabXiisadda dusha sare mararka qaarkood waxay taageeri kartaa walxaha ka cufnaan badan dareeraha, gaar ahaan haddii shaygu yar yahay ama uu leeyahay qaab "ku xayiran" dusha sare ee dareeraha. Si kastaba ha ahaatee, waqti ka dib, haddii cufnaanta shaygu ay ka badan tahay, waxay u badan tahay inay quusto.
- Cufnaanta shay isku mid ah ma ka duwanaan kartaa meelo kala duwan oo ku jira shayga?
- Jawaab: Maya. Shay isku mid ah, cufnaanta waa isku mid, taasoo la macno ah inay leedahay qiime isku mid ah meel kasta oo ku jirta shayga.
