For a cylindrical metal pipe the outer radius and inner radius are measured as…
PHYSICS · Multi-part · A Level · Physics · Measurements and their errors · Measurements and their errors
Problem
For a cylindrical metal pipe the outer radius and inner radius are measured as follows:
Outer radius: 5.62cm(±0.02cm)
Inner radius: 5.14cm(±0.03cm)
(i) Convert both radii to millimetres, writing each value with the correct number of significant figures.
(ii) Determine the thickness of the pipe wall and its absolute uncertainty.
(iii) Compute the percentage uncertainty in the wall thickness.
(iv) Report the wall thickness together with its uncertainty in the form value±uncertainty, rounded to an appropriate number of significant figures.