Mass of the steel is 
- density of a substance can be regarded as the ratio of the mass of that substance to that of it's volume.
- Mass of substance can be regarded as the quantitative measure of inertia, it can be simply explained as a fundamental property of all matter
<em> We can express this mathematically as ;</em>
Given :
Density of this steel= 8.1g/cm3

If we make Mass subject of formula,

Then let us substitute the values into the expression

Therefore, mass of the steel is 
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Answer:
A,C,D,B
Explanation:
1killometer=1000m
1mm=0.001m
1cm=0.01m
base unit of length is meter
Answer:
water - to drink
forests - to go camping and to get lost
wetlands - to see some rare wildlife
parks - to play
Answer:
Elements in the same group have the same number of valence electrons.
Explanation: Science.