mass=volume * density.By using this formula we can find the mass of sphere.Volume of sphere=(4/3)pi*r^3V=(4/3)*3.14*(1*10^-2)^3=4.187*10^-6Mass=(4.187*10^-6)*900=3768*10^-6kg
Mass of the sphere is = 4.713 × 10^−4 kg
density = mass/ volumegiven denstiy = 900kg/m3 and diameter = 1cm so radius(R) = 0.5 cm = 0.005m900 = mass/ (4/3 π R3 )Mass = (900*3 π R^{3} )/4 = (900*3* π *(0.005)^{3} )/ 4 = 2.650718801×10?4 Kg
radius=0.5cm
Volume=4/3pi x (0.5)^{3}
=0.52 cm^{3}
= 0.52 x 10^{-6 }m^{3}
Mass= Density x Volume
= 900 x 0.52x10^{-6 }kg
=0.468 g