Advertisements
Advertisements
प्रश्न
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.
Advertisements
उत्तर
(i) Volume of the body = (W - W1) cm3
(ii) Upthrust on the body = (W - W1)gf
(iii) R.D. of the material of body = `("W")/("W - W"_1)`
APPEARS IN
संबंधित प्रश्न
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].
A body floats in a liquid with a part of it submerged inside the liquid. Is the weight of floating body greater than, equal to or less than the upthrust?
Explain the following :
An egg sinks in fresh water, but floats in a strong salt solution.
A solid lighter than water is found to weigh 7.5 gf in air. When tied to a sinker the combination is found to weigh .If the sinker alone weighs 72.5 gf in water, find R.D. of solid.
A trawler is fully loaded in sea water to maximum capacity. What will happen to this trawler, if moved to river water? Explain your answer.
A body of mass 50 g is floting in water. What is the apparent weight of body in water? Explain your answer.
Select the correct option:
With the increase in the density of the fluid, the upthrust experienced by a body immersed in it:
Write the SI units of Relative density
A wooden cube of side 10 cm has a mass of 700 g. It will float in the water with:
(a) Half of its volume inside the water
(b) 3 cm height above the water surface
(c) 7 cm height above the water surface
(d) Just inside the water surface.
