Momentum and CollisionHard
Question
A crown made of gold and copper weights 210 g in air and 198 g in water. The weight of gold in crown is : -
[Given : Density of gold = 19.3 g/cm3 and Density of copper = 8.5 g/cm3]
[Given : Density of gold = 19.3 g/cm3 and Density of copper = 8.5 g/cm3]
Options
A.93 g
B.100 g
C.150 g
D.193 g
Solution
Let mass of gold is m then mass of copper = 210-m upthrust = loss of weight
= 210g - 198g ⇒ Vln ρwg = 12g ⇒ Vln = 12 cm3
Total volume
=
= 12 ⇒ 
= 12
m = 193.
So weight of gold = 193 g
= 210g - 198g ⇒ Vln ρwg = 12g ⇒ Vln = 12 cm3
Total volume
=
= 12 ⇒ = 12m = 193.
So weight of gold = 193 g
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