The lengths of three metal strips to be joined end-to-end are measured as follows: , ,
PHYSICS · Multi-part · A Level · Physics · Measurements and their errors · Measurements and their errors
Problem
The lengths of three metal strips to be joined end-to-end are measured as follows:
l1=125.6±0.1mm,
l2=8.42±0.05cm,
l3=0.154±0.002m.
Answer the following:
(a) Convert each length to centimetres.
(b) Determine the total length and its absolute uncertainty.
(c) Express the final result in the form length ± uncertainty, rounded to the correct number of decimal places.