2. For multiplication and division (e.g., with u = xy and v = x/y) the relative uncertainties add: Ax Ay + Au Axy + Ay, T y v Ax Ay Ax + Av= + y Y y 13 G2 where the only difference is the value of vs. v to get the expressions on the right side of the arrows (it is usually simpler to remember the left equations). Evaluate the central values and uncertainties in u and v for the following possible x and y values. y = (1.20.4) m (a) = (3.50.5) m, (b) x = (13.10.1) m, y = (14.40.9) m (c) x=(110. 5) m, y = (2459) m (1.8) (1.9)