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Standard IX

Physics

Density

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Question

You have a metallic cube of side 3cm . If the density of the metal is about 8000kg m^-3 the best suited spring balance for determining the weight of the cube should have a range of ::
a) 0 - 100 g.wt
b) 0 - 200 g.wt
c) 0 - 250 g.wt
d) 0 - 500 g.wt
Explain why.

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Solution

Volume of cube =(edge length)^3 =(3cm)^3 =27cm^3

density =8.0g/cm^3
mass = vol x density
=8.0 x 27 =216 g
hence,
range of mass is zero to 216
hence, spring slide between zero to 216

we see in the picture 0-250g.wt spring balance is the best for measuring this range.

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You have a metallic cube of side 3cm . If the density of the metal is about 8000kg m-3 the best suited spring balance for determining the weight of the cube should have a range of :: a) 0 - 100 g.wt b) 0 - 200 g.wt c) 0 - 250 g.wt d) 0 - 500 g.wt Explain why.

Volume of cube =(edge length)^3 =(3cm)^3 =27cm^3 density =8.0g/cm^3 mass = vol x density =8.0 x 27 =216 g hence, range of mass is zero to 216 hence, spring slide between zero to 216 we see in the picture 0-250g.wt spring balance is the best for measuring this range.

You have a metallic cube of side 3cm . If the density of the metal is about 8000kg m^-3 the best suited spring balance for determining the weight of the cube should have a range of ::
a) 0 - 100 g.wt
b) 0 - 200 g.wt
c) 0 - 250 g.wt
d) 0 - 500 g.wt
Explain why.

Volume of cube =(edge length)^3 =(3cm)^3 =27cm^3

density =8.0g/cm^3
mass = vol x density
=8.0 x 27 =216 g
hence,
range of mass is zero to 216
hence, spring slide between zero to 216

we see in the picture 0-250g.wt spring balance is the best for measuring this range.