Is this correct?
Steel has a density of 7.9 g/cm^3 , what is the mass of a steel sphere with a diameter of 5.00 cm?
$$v = \frac{4}{3}{\pi}r^3$$
$$v = \frac{4}{3}(3.14)(2.5)^3$$
$$v =65.416 ~\text{cm}^3$$

$$D = \frac{ m }{ v }$$
$$7.9 = \frac{ m }{ 65.416}$$
$$m = 516.7864$$

Question

Is this correct?
Steel has a density of 7.9 g/cm^3 , what is the mass of a steel sphere with a diameter of 5.00 cm?
$$v = \frac{4}{3}{\pi}r^3$$
$$v = \frac{4}{3}(3.14)(2.5)^3$$
$$v =65.416 ~\text{cm}^3$$

$$D = \frac{ m }{ v }$$
$$7.9 = \frac{ m }{ 65.416}$$
$$m = 516.7864$$

anonymous · Answer

volume of a sphere=(4/3)pi x r^3

shamil98 · Answer

oh, i was looking at surface area, oops

shamil98 · Answer

edited it, it's correct now right?

anonymous · Answer

yes