Advertisements
Advertisements
प्रश्न
A rubber ball floats on water with its 1/3rd volume outside water. What is the density of rubber?
Advertisements
उत्तर
Let the volume of the ball be V .
Volume of ball above the surface of water = `1/3`V
∴ Volume of ball immersed in water = `"V" - 1/3"V" = 2/3 "V"`
By the principle of floatation on,
`"Volume of rubber ball immersed"/"Total volume of rubber ball" = "Density of rubber"/"Density of water"`
or , `2/3 = "Density of rubber"/1000`
or , Density of rubber ball = `1000 xx 2/3 = 666.7 "kgm"^3 ≈ 667 "kgm"^3`
APPEARS IN
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 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 loaded cargo ship sails from sea water to river water. State and Explain your observations.
Explain the following :
Toy balloons filled with hydrogen rise to the ceiling, but if they are filled with carbon dioxide, then they sink to the floor.
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 piece of wax floats on brine. What fraction of its volume is immersed?
Density of wax = 0.95 g cm-3, Density of brine = 1.1 g cm-3.
When a piece of ice floating in water melts, the level of water inside the glass remains same. Explain.
Select the correct option:
A body has density 9.6 gcm -3. Its density in SI system is:
Write the SI units of Weight of a body
