Q1: To say you measured using a meter rule a length of an object 3 times to get the following readings : 61 mm , 64 mm , 65 mm how do we find out the uncertainty?
Q2: To say you measured a diameter of a ball and the percentage uncertainty is 1 % what will be the the percentage uncertainty of its radius? (Do we divide by 2 because i remember in another question to find the perimeter of a rectangle we multiplied the uncertainty of the length and width by 2 to find the total uncertainty)