a element has density of 20 g/cm^3. what is the radius of a sphere that has a mass of 70 kg of this material?
ρ=20g/cm3, m=70kg = 70000g
Use equation,
Density = mass/volume
ρ=m/V
V= m/ρ
(4/3*πr3) = m/ρ
r3= 3πm/4ρ
r= (3πm/4ρ)1/3
Plug values,
r = [(3*3.14*70000)/(4*20)]^1/3
r = 20.20 cm
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