ohnoez! SG how to do this: a measurement of the length of string is made using a metre rule. the length L of the string is half a metre. wat is the fractional uncertainty of L²? ans is 0.004
SBS261P SG precision of metre rule is +-0.001mso your L is 0.500m +- 0.001mL²=0.25m²use your formula to get uncertainty for L²