F. Solve the following numerical problems:-
1. Calculate the density of a solid of mass 20 kg if it occupies a volume of 4 ms.
2. The density of copper is 8.4 g/cm3. What will be the volume of 200 g of copper?
3. Find the mass of 50 cm3 of silver if its density is 10.5 g/cm.
4. A rectangular piece of wood measures 4 cm by 6 cm by 8 cm and has a mass of 20 g. what is the density of the piece of wood
Answers
Explanation:
1.mass = 20 kg
volume = 4m^3
density= mass / volume
= 20/4
=5 kg/m^3
2.- Density of copper = 8.4g/cm³
Volume of copper = 200g
Since, We know that,
=Density of substance/Amount of substance
= Amount of substance=Density into volume
= 8.4g into 200gcm-3g-1
= 1680 cm³
3.Given,
Volume of the cube = 50cm^3
Density = 10.5g/cm^3
Mass = density × volume
= 10.5 × 50
= 525 g
4.we know that,density= mass/volume
mass= 20 gm (given)
volume= length*breadth *height
so, volume= 4*6*8
= 192cm³
therefore, density= 20/192
= 0.104
since its density is less than the density of water.
Therefore it'll float on water....
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