Advertisements
Advertisements
प्रश्न
A body of volume 100 cm3 weighs 5 kgf in air. It is completely immersed in a liquid of density 1.8 × 103 kg m-3. Find:
- The upthrust due to liquid and
- The weight of the body in liquid.
Advertisements
उत्तर
Volume of body = V = 100 cm3
= 100 × 10-6
= 10-4m3
Weight in air W = 5 kgf
Density of liquid d = 1.8 × 103 kg/m3
(i) Upthrust due to liquid = Volume of the solid submerged × density 0
= 10-4 × 1.8 × 103 × g
= 0.18 gN
= 0.18 kgf
(ii) Weight of body in liquid = Weight of body in air - upthrust
= 5 kgf - 0.18 kgf
= 4.82 kgf
APPEARS IN
संबंधित प्रश्न
A bunch of feathers and a stone of the same mass are released simultaneously in air. Which will fall faster and why? How will your observation be different if they are released simultaneously in vacuum?
Complete the following sentence.
Density of water is .... ... kg m-3.
A body weighs W gf in air and W1 gf when it is completely immersed in water. Find: (i) Volume of the body, (ii) Upthrust on the body and (iii) Relative density of the material of the body.
The density of water is :
A jeweller claims that he makes ornaments of pure gold that has a relative density of 19.3. He sells a bangle weighing 25.25 gf to a person. The clever customer weighs the bangle when immersed in water and finds that it weighs 23.075 gf in water. With the help of suitable calculations, find out whether the ornament is made of pure gold or not.
[Hint : calculate R.D. of material of bangle which comes out to be 11.6].
What can you say about the average density of a ship floating on water in relation to the density of water?
Explain the following :
A balloon filled with hydrogen rises to a certain height and then stops rising further.
A rubber ball floats on water with its 1/3rd volume outside water. What is the density of rubber?
A body of mass ‘m’ is floating in a liquid of density ‘p’
what is the apparent weight of body?
Select the correct option:
The ratio between the mass of a substance and the mass of an equal volume of water at 4°C is called:
