Figure P1.50 on page 18 shows students study- ing the thermal conduction of energy into cylindrical blocks of ice. As we will see in Chapter 20, this process is described by the equation 2 _ k#d(T T) At 4L For experimental control, in one set of trials all quanti- ties except d and At are constant. (a) If d is made three times larger, does the equation predict that At will get larger or get smaller? By what factor? (b) What pattern of proportionality of At to d does the equation predict? (c) To display this proportionality as a straight line on a graph, what quantities should you plot on the hori- zontal and vertical axes? (d) What expression repre- sents the theoretical slope of this graph? Figure P1.50 Alexandra Hder