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प्रश्न
'The density of iron is 7800 kg m-3'. What do you understand by this statement?
उत्तर
It means the mass of 1 m-3 of iron is 7800 kg.
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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].
Explain the following :
A balloon filled with hydrogen rises to a certain height and then stops rising further.
A hollow cylinder of copper of length 25 cm and area of cross-section 15 cm2, floats in water with 3/5 of its length inside water. Calculate:
(1) apparent density of a hollow copper cylinder.
(2) wt. of cylinder.
(3) extra force required to completely submerge it in water.
A body of mass 50 g is floting in water. What is the apparent weight of body in water? Explain your answer.
Write the SI units of Density
Write the SI units of Weight of a body
Complete the following result:
Mass = _______ × density
Complete the following result:
The density of water is ______ Kgm-3.
Complete the following result:
Density in kg m-3 = ______ x density in g cm-3
