The coefficient of expansion is 13 * 10^-6 m per meter length.per oK The temperature difference = 42 - - 8 = 50 oC delta T = (42 + 273) - (-8 + 273) = 50 oK delta L = L * 13* 10^6 m/oK oK = 50 oK delta L = 19.5 cm = 19.5 cm [1m / 100 cm] = 0.195m So we need to find the length and it is computed by: 0.195= L * 13 * 10^-6 * 50 L = 0.195 / (13*10^-6*50) L = 300 m
Index fossils (also known as guide fossils, indicator fossils or zone fossils) are fossils used to define and identify geologic periods (or faunal stages).
