What is the density of a nickel?

Question

What is the density of a nickel?

Answer 1

density of nickel is 8.902 g/cm3 at 20 degrees C

As the temperature increases, this density

will decrease: the mass of the nickel will remain

constant while it's volume increases.

d=mass/volume

Answer 2

a nickel is

21.21 mmdiameter

1.95 mm thickness

5.00 g weight

75% copper, 25% nickel

Volume of a cylinder

  V = πr²h

  V = π(1.95)(21.21/2)² = 689 mm³

density is 5/689 = 0.0072571 g/mm³

0.0072571 g/mm³ x 1kg/1000g x 1000³mm³/m³ = 7257 kg/m³ (bad answer)

That number seems low, I think the dimensions are overall outside dimensions and don't take into account the voids from the stamped impressions.

they are 75% copper, 25% nickel

density copper 8960 kg/m³

density nickel 8902 kg/m³

so the overall density should be

0.75 * 8960 + 0.25 * 8902 = 6720+2226 = 8946  kg/m³ (good answer)

the latter answer i trust more.

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