Advertisements
Advertisements
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].
उत्तर
R.D. of pure gold = 19.3
Weight of bangle in air, W1 = 25.25 gf
Weight of bangle when completely immersed in water W2 = 23.075 gf
R.D. of bangle = `W_1/(W_1 - W_2) xx "R.D. of water"`
R.D. of bangle = `25.25/(25.25 - 23.075) xx 1`
R.D. of bangle = 11.6
The bangle is not made of pure gold as its density is not 19.3.
संबंधित प्रश्न
Assuming the density of air to be 1.295 kg m-3, find the fall in barometric height in mm of Hg at a height of 107 m above the sea level. Take density of mercury = 13.6 × 103 kg m-3.
A body dipped into a liquid experiences an upthrust. State two factors on which upthrust on the body depends.
Complete the following sentence :
An empty tin container with its mouth closed has an average density equal to that of a liquid. The container is taken 2 m below the surface of that liquid and is left there. Then the container will ____________ .
Water is heated from 0°C to 10°C . How does the density of water change with temperature?
Explain why an iron nail floats on mercury, but it sinks in water.
Hint : Density of iron is less than that of mercury, but more than that of water.
A wooden cube of side 10 cm has mass 700 g. What part of it remains above the water surface while floating vertically on water surface?
A body of mass ‘m’ is floating in a liquid of density ‘p’
what is the apparent weight of body?
A body of mass ‘m’ is floating in a liquid of density ‘p’
what is the loss of weight of body?
Select the correct option:
When a body is floating in a liquid:
