To calculate the radius of the boiling tube, we can use the formula for the circumference of a circle: Circumference = 2 * π * radius.
Given that the wire was wound 10 times around the boiling tube, and the total length of the wire wound around was 440mm, we can find the circumference of the circle (which is the same as the length of wire wound around) by multiplying the number of windings by the total length of the wire:
Total length of wire = Number of windings * Circumference of the boiling tube
440mm = 10 * Circumference
Circumference = 440mm / 10
Circumference = 44mm
Now, we use the formula for the circumference of a circle to find the radius:
Circumference = 2 * π * radius
44mm = 2 * π * radius
radius = 44mm / (2 * π)
radius ≈ 7mm
Therefore, the radius of the boiling tube is approximately 7mm in SI units.
