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A metal sphere r1 = 3.2 cm has a mass m1 = 0.08 kg. What is the density of the metal P in kg per cubic meter? What is the mass m2 of a sphere of radius r2 = 5.7 cm made of the same metal?

p = kg/m^3

m2 = kg

Added Thu, 25 Jun '15

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mass = volume * density

For sphere

mass = 4/3*pi *r^3*density

m1 = 4/3*pi*r1^3*rho

rho = m1*3/4/r^3/pi

rho = 5.83*10^-4 Kg/cc

Calculating m2

m2 = 4/3*pi*r2^3*rho = 0.452 Kg

Added Thu, 25 Jun '15

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