Suppose you are determining the velocity of a baseball by measuring the distance it travels, X, in a time T. You measure X to be 32.5 m ± 0.5 m, and you measure T to be 10 seconds. Assume that T is known "exactly", i. e. the error in T is so small that it can be neglected. Compute the velocity V = X/T, and also compute ζV, the uncertainty in V.

Light from two different sources are incident upon the same side of a polarizing filter. light from one source is polarized with total intensity ip, while light from the other source is unpolarized with total intensity iu. as you rotate the polarizing filter through 360 degrees, the intensity of the transmitted light on the other side varies by a factor of 9. what is the relative intensity of the initial polarized source to the unpolarized source, or ip/iu?