Advertisements
Advertisements
प्रश्न
The density of water is 1.0 g Cm-3. The density of iron is 7.8 × 10″3 g Cm-3. The density of mercury is 13.6 g Cm-3.
Ans the following:
Will a piece of iron float or sink in water?
Advertisements
उत्तर
Density of water = 1.0 g/cm3
Density of iron = 7.8 × 103 g/cm3 = 7800 g/cm3 (which is much greater than 1.0 g/cm3)
Since iron is much denser than water, A piece of iron will sink in water.
APPEARS IN
संबंधित प्रश्न
Relative density of a substance is expressed in g cm-3.
Distinguish between density and relative density.
What is the law of floatation?
Explain why an iron needle sinks in water, but a ship made of iron floats on water.
For a given object, the buoyant force in liquids of different ______ is ______.
The pressure P1 at a certain depth in river water and P2 at the same depth in sea water are related as :
- Calculate the height of a water column which will exert on its base the same pressure as the 70 cm column of mercury. Density of mercury is 13.6 g cm-3.
- Will the height of the water column in part (a) change if the cross-section of the water column is made wider?
A body experiences an upthrust F1 in river water and F2 in sea water when dipped up to the same level. Which is more, F1 or F2? Give reason.
Pressure in a water pipe on the ground floor of a building is 100,000 Pa. Calculate the pressure in the water pipe on the first floor at a height of 3 m. [Density of water = 1000 kgm−3 ; g = 10 ms−2]
What do you mean by buoyancy?
