patriaprastikaAsumsikan benda tercelup seluruhnya dalam kedua fluida tersebut
mu = 500 gram = 0,5 Kg → Wu = 5 Newton ma = 225 gram = 0,225 Kg → Wa = 2,25 Newton mc = 112,5 gram = 0,1125 Kg → Wc = 1,125 Newton * Mencari volume benda : FA = Wu - Wa ρ air • g • V tercelup = Wu - Wa 1 • 10 • V = 5 - 2,25 10V = 2,75 V = 0,275 cm³ * Mencari massa jenis cairan : FA = Wu - Wc ρ cairan • g • V tercelup = Wu - Wc ρ • 10 • 0,275 = 5 - 1,125 2,75ρ = 3,875 ρ = 3,875/2,75 ρ = 1,41 g/cm³
mu = 500 gram = 0,5 Kg → Wu = 5 Newton
ma = 225 gram = 0,225 Kg → Wa = 2,25 Newton
mc = 112,5 gram = 0,1125 Kg → Wc = 1,125 Newton
* Mencari volume benda :
FA = Wu - Wa
ρ air • g • V tercelup = Wu - Wa
1 • 10 • V = 5 - 2,25
10V = 2,75
V = 0,275 cm³
* Mencari massa jenis cairan :
FA = Wu - Wc
ρ cairan • g • V tercelup = Wu - Wc
ρ • 10 • 0,275 = 5 - 1,125
2,75ρ = 3,875
ρ = 3,875/2,75
ρ = 1,41 g/cm³
Jadi, rapat cairan itu adalah 1,41 g/cm³
Ok?
Vb = (mb - m₁') / ρf₁
mb = mb
m₁' + ρf₁ Vb = m₂' + ρf₂ Vb
m₁' + (mb - m₁') = m₂' + ρf₂ (mb - m₁')/ρf₁
mb ρf₁ = m₂' ρf₁ + ρf₂ (mb - m₁')
ρf₂ = (mb - m₂') ρf₁ / (mb - m₂')
ρf₂ = (500 - 112,5) 1 / (500 - 225)
ρf₂ = 387,5 / 275
ρf₂ = 1,41 g/cm³