Current Time : 04:18:45 PM Time Left : 7 hours 37 minutes 7. When the temperature of a coin is raised by 70 .F, the coin's diameter increases by 2.40 x 10 m. If the original diameter is 2.05 x 10 2 m, find the coefficient of linear expansion. ( OC ) - 1 8. Concrete sidewalks are always laid in sections, with gaps between each section. For example, the figure shows four identical 5.70-m sections, the outer two of which are against immovable walls. The three identical gaps between the sections are provided so that thermal expansion will not create the thermal stress that could lead to cracks. What is the minimum gap width necessary to account for an increase in temperature of 38 .C? cm 9 A 685 a piece of conner is heated in a furnace to a temperature T The conner is then inserted into a 165 a conner 4 MacBook Air