A spherical steel ball has a mass of 3.475 g and a diameter of 9.40 mm. what is the density of the steel? ( The volume of a sphere is [tex](4/3)\pi r^{3}[/tex] where r is the radius)

Respuesta :

Answer:

Explanation:

The formula for determining the volume of a spherical steel ball is expressed as

Volume = (4/3)πr³

Where

r represents the radius of the spherical steel ball.

π is a constant whose value is 3.14

Diameter = 9.4 mm

Radius = diameter/2 = 9.4mm/2 = 4.7mm

Volume = 4/3 × 3.14 × 4.7³

Volume = 434.67 mm³

Density = mass/volume

Mass = 3.475g

Density = 3.475/434.67

Density = 0.008 g/mm³

The density of the spherical steel ball is 7988.5 kg/m³

Density, mass and volume

From the question, we are to determine the density of the steel.

Density is given by the formula

[tex]Density = \frac{Mass}{Volume}[/tex]

First, we will determine the volume of the spherical steel ball

The volume is given by the formula,

[tex]V = \frac{4}{3}\pi r^{3}[/tex]
Where r is the radius

From the given information,

Diameter, d = 9.40 mm

Then, [tex]r =\frac{9.40}{2}[/tex]

r = 4.70 mm = 0.0047 m

Therefore,

[tex]V = \frac{4}{3} \times 3.142 \times (0.0047)^3[/tex]

V = 4.35 × 10⁻⁷ m³

Now, for the density of the steel

From the given information,

Mass of the steel ball = 3.475 g = 0.003475 kg

Therefore,

[tex]Density = \frac{x0.003475}{4.35 \times 10^-7}[/tex]

Density = 7,988.5 kg/m³

Hence, the density of the spherical steel ball is 7988.5 kg/m³

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