Before 1982 U.S pennies were made of solid copper. As the price of copper rose,the U.S mint switched to a composition that is 97.5% zinc and 2.5% copper. A penny minted after 1982 is 19 mm in diameter and 1.6 mm thick.

What is the volume of a penny in mL?

volume = pi*r2*h

pi=3.14
r = (19/2) mm and I suggest you change this to cm by dividing by 10 so (18/20) cm radius.
height is 1.6 mm or 0.16 cm.

Using the cm measurements, the volume will be in cubic centimeters, or cc, and that is the same as mL.

To find the volume of a penny, we need to multiply its height by its cross-sectional area. The cross-sectional area of a penny can be calculated as the product of its diameter and the height of the coin.

Given:
Diameter of the penny = 19 mm
Height (thickness) of the penny = 1.6 mm

First, we need to calculate the radius of the penny (half of the diameter):
Radius = Diameter / 2
Radius = 19 mm / 2 = 9.5 mm

Now, we can calculate the cross-sectional area (A) of the penny using the formula:
A = π * r^2
where π is a mathematical constant approximately equal to 3.14159 and r is the radius of the penny.

A = 3.14159 * (9.5 mm)^2
A ≈ 3.14159 * (9.5 mm) * (9.5 mm)
A ≈ 282.7434 mm^2

Next, we multiply the cross-sectional area by the thickness (height) of the penny to obtain the volume:
Volume = A * height
Volume = 282.7434 mm^2 * 1.6 mm
Volume ≈ 452.3894 mm^3

Finally, to convert the volume from mm^3 to mL, we know that 1 mL is equal to 1 cm^3. Therefore, we divide the volume by 1,000 to convert it to mL:
Volume (in mL) = Volume (in mm^3) / 1,000
Volume (in mL) ≈ 452.3894 mm^3 / 1,000
Volume (in mL) ≈ 0.4524 mL

So, the volume of a penny is approximately 0.4524 mL.