the diameter of an iron ball is used to putting the shot is 12cm. the density of the iron is 7.8g/cm^3. calculate the mass of the ball in kg
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The volume of the ball is 4/3(pi)r^3, where r is the radius, which is half of 12cm=6cm. The volume is therefore about 904.779cc. Density is mass divided by volume, so if m is the mass, 7.8=m/904.779. m=7.8*904.779=7057.27g approx.

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