9 mau laʻana o nā nīnau density
1. ʻO ka nui o kahi mea he 8 kenimika3 Inā he 84 grams ke kaumaha, a laila ʻo ka nui o ka paʻapū...
A. 10,5 gr/cm3
B. 8,5 gr/cm3
C. 6,4 gr/cm3
D. 4,8 gr/cm3
Pahana
Ua ʻike ʻia:
Ka nui (V) = 8 kenimika3
Ka nuipa (m) = 84 grams
Ua nīnau ʻia: Ka nui (ρ)
Pane:
Haʻilula mānoanoa :
ρ = m / V = 84 gram / 8 kenimika3 = 10,5 gram/cm3
ʻO A ka pane pololei.
2. He 5 kenimika ka nui o kahi pahu lāʻau3Inā he 250 g/cm ka nui o ka lāʻau3, a laila ʻo ke kaumaha o ka wahie…
A. 1250 g
B. 50 g
C. 10 g
D. 2 g
Pahana
Ua ʻike ʻia:
Ka nui o ka lāʻau (ρ) = 250 g / cm3
Ua nīnau ʻia: Papa lāʻau
Pane:
Haʻilula mānoanoa:
ρ = m / V
ʻIkepili: ρ = ka nui, V = ka nui, m = ka nuipa
Ka nui o ka lāʻau:
m = ρ V = (250 g / cm3)(5 kenimika3) = 1250 grams
3. E nānā i ke kiʻi ma ka ʻaoʻao!
Inā he 35 kenimika ka nui o ka wai3 a ʻo ke kaumaha o ka mea = 60 grams, a laila ʻo ka nui o ka mea...
A. 2,40 g/cm
B. 1,71 g/cm3
C. 1.00 g/cm3
D. 0,63 g/cm3
Pahana
Ua ʻike ʻia:
Ka nui o ka wai (V) = 35 kenimika3
Ka nuipa o ka mea (m) = 60 grams
Ua nīnau ʻia: Ka nui o Benlā (ρ)
Pane:
Ka nui o ka paʻa:
ρ = m / V = 60/35 = 1,71 grama/kenimika3
ʻO ka pane pololei ʻo B.
4. He 120 grams ke kaumaha o kahi metala alumini a he 60 cm ka nui.3 a laila ʻo ke kaumaha ...
A. 2 gr/cm3
B. 20 gr/cm3
C. 200 gr/cm3
D. 2.000 gr/cm3
Pahana
Ua ʻike ʻia:
Ka nuipa (m) = 120 grams
Ka nui (V) = 60 kenimika3
Ua nīnau ʻia: Ka nui o ka paʻa
Pane:
Haʻilula mānoanoa:
ρ = 120 grams / 60 kenimika3
ρ = 2 gram/cm3
ʻO A ka pane pololei.
5. Ua ana ʻehā mau haumāna i nā mea, ua hōʻike ʻia nā hopena o ka hoʻokolohua ma ka papa aʻe:
ʻO nā haumāna e ana i nā mea me nā mea like…
A. Nā Haumāna A a me B
B. Nā Haumāna B a me C
C. Nā Haumāna B a me D
D. Nā Haumāna C a me D
Pahana
ʻO nā mea i hana ʻia me ka mea like, he like ka nuipaʻa a i ʻole ke kaumaha like. I ka ʻaoʻao ʻē aʻe, he ʻokoʻa nā kaumaha o nā mea i hana ʻia me nā mea like ʻole.
ʻO ke ʻano hana no ka density:
ρ = m / V
Wehewehe: ρ = ka nuipaʻa, m = ka nuipaʻa, V = ka nui
ʻO ka pane pololei ʻo B.
6. E nānā i ke kiʻikuhi ana me ka hoʻohana ʻana i nā mea hana a me nā mea hana ma lalo nei! Inā he 300 grams ke kaumaha o kahi mea, a laila ʻo ka nui o ka mea...
A. 3,0 g/cm3
B. 7,5 g/cm3
C. 15 g/cm3
D. 320 g/cm3
Pahana
Ua ʻike ʻia:
Ka nuipa o ka mea (m) = 300 grams
Ka nui o ka mea (V) = ka nui o ka wai i ninini ʻia = 20 kenimika3
Ua nīnau ʻia: Ka nui o kahi mea
Pane:
Haʻilula mānoanoa:
ρ = m / V = 300 gram / 20 kenimika3 = 15 gram/cm3
ʻO C ka pane pololei.
7. E nānā i ke kiʻi!
Inā e hoʻokomo ʻia kahi mea me ke kaumaha o 316 grams i loko o kahi pahu i piha i ka wai e like me ka mea i hōʻike ʻia ma ke kiʻi, a laila ʻo ka nui o ka mea...
A. 7,9 kg/m3
B. 15,8 kg/m3
C. 7.900 kg/m3
D. 15.800 kg/m3
Pahana
Ua ʻike ʻia:
Ka nuipa o ka mea (m) = 316 grams
Ka nui o ka mea (V) = ka nui o ka wai i ninini ʻia = 40 milliliters
Ua nīnau ʻia: Ka nui o kahi mea
Pane:
Ma mua o ka helu ʻana i ka nuipaʻa, e hoʻololi mua i nā anakahi o ka nuipaʻa a me ka leo o ka mea.
Ka nuipa o ka mea = 316 grams = 316/1000 kg = 0,316 kg
Ka nui o ka mea = 40 milliliters = 40/1000 lita = 4/100 lita = 0,04 lita
1 lita = 1 dekimika cubic (dm)3) = 1/1000 mika kūpika (m3) = 0,001 mika3
0,04 lita = (0,04)(0,001) m3 = 0,00004 m3
Ka nui o ka mea:
ρ = m / V = 0,316 kg / 0,00004 m3 = 316 kg / 0,04 m3 = 7900 kg / m3
ʻO C ka pane pololei.
8. E hoʻolohe i ke kiʻi ana ma lalo nei!
ʻO ka nui o ka pōhaku e like me ka ʻikepili ma nā kiʻi (Kiʻi 1) a me (Kiʻi 2)
A. 6.000 kg/m3
B. 4.000 kg/m3
C. 2.400 kg/m3
D. 670 kg/m3
Pahana
Ua ʻike ʻia:
E hōʻike i nā ʻāpana āpau o ka ʻōnaehana honua
Ka nuipa o ka pōhaku (m) = 100 grams + 20 grams = 120 grams = 120 / 1000 kilokani = 0,120 kilokani
Ka nui o ka pōhaku (V) = ka nui o ka wai i hoʻoneʻe ʻia = 80 milliliters – 60 milliliters = 20 milliliters = 20 / 1000 liters = 2/100 liters = 0,02 liters
1 lita = 1 dekimika cubic (dm)3) = 1/1000 mika kūpika (m3) = 0,001 mika3
0,02 lita = 0,02 x 0,001 m3 = 0,00002 m3
Ua nīnau ʻia: Ka nui o ka pōhaku
Pane:
Ka nui o ka pōhaku:
ρ = m / V = 0,120 kg / 0,00002 m3 = 120 kg / 0,02 m3 = 6000 kg / m3
ʻO A ka pane pololei.
9. Ua hāʻawi ʻia ʻo Susi, he haumāna papa 7, i kahi haʻawina e kāna kumu e hoʻoholo i ke ʻano o ka mea ʻO M. Ua ana ʻo Susi i ke kaumaha a me ka leo o ka mea me ka hoʻohana ʻana i nā mea hana i hōʻike ʻia ma ke kiʻi.
Ma muli o nā hopena o nā ana o ka mea a me ke kūlike o ka nui ma ka papa, ʻo ke ʻano o ka mea e ana ʻia nei...
A. Alumini
B. Zinc
C. Hao
D. Kuningan
Pahana
Ua hōʻike ʻia nā ʻāpana āpau ma ka International System
Ua ʻike ʻia:
Ka nuipa o ka mea M (m) = 168 grams = 168/1000 kilokani = 0,168 kilokani
Ka nui o ka mea M (V) = ka nui o ka wai i hoʻoneʻe ʻia = 80 ml – 60 ml = 20 milliliters = 20/1000 liters = 2/100 liters = 0,02 liters
1 lita = 1 dekimika cubic (dm)3) = 1/1000 mika kūpika (m3) = 0,001 mika3
0,02 lita = 0,02 x 0,001 m3 = 0,00002 m3
Ua nīnau ʻia: Ka nui o kahi mea
Pane:
ʻO ke ʻano o ka nui o kahi mea:
ρ = m / V = 0,168 kg / 0,00002 ka m3 = 168 kg / 0,02 m3 = 8400 kg / m3
Ma muli o ka papa kuhikuhi density, he 8400 kg/m ka density o kahi mea3 he keleawe.
ʻO D ka pane pololei.
Puna nīnau:
Nā Nīnau Hoʻokolohua ʻEpekema Lahui no ke Kula Kiʻekiʻe Haʻahaʻa/Kula Kiʻekiʻe ʻIslama
