Question

1. What fraction of an iceberg of density 910 kg/m' will be above the surface of sea
water of density 1170 kg/m?


2. A balloon of volume 100 m is filled with hot air of density 0.40 kg/m. If the fabric of
balloon weighs 6 kgf and an equipment P is attached to it, such that balloon is in the
state of equilibrium. Calculate 1) weight of hot air and balloon ii) weight of hot air,
balloon and cquipment iv) weight of equipment? [Density of cold air is 1.3 kg/m]


3. A test tube weighing 17 gf, floats in alcohol to the level P. When the test tube is made
to float in water to the level P, 3 gf of the lead shots are to be added in it. Find the
RD of alcohol.

4. A wooden block floats in alcohol with 3/8 of its length above alcohol. If it is made to
float in water, what fraction of its length is above water? Density of alcohol is 0.80
g/cm 2​

Answer 1

Answer:

Explanation:

Let the volume of the cube be V and the fraction of cube outside water be f.

Thus, volume of ice inside water = volume of water displaced =(1−f)V

Under equilibrium,

Weight of ice = Weight of water displaced

⟹Vρ  

ice

​

g=(1−f)Vρ  

water

​

g

⟹(1−f)=  

10

9

​

 

⟹f=  

10

1

​

 

Thus, the percentage of volume outside water =10%

Answer 2

Answer:

2/9

option -2

Explanation:

you need to use on of the formula