Current Time : 1: 18:45 PM Time Left : 7 how 10 minutes 7. When the temperature of a coin is raised by 70 "F, the coin's diameter increases by 2.40 x 10 5m. If the original diameter is 2.05 x 10-3 m, find the coefficient of linear expansion. 126 am2 ar 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? am m2671 in2671 am2671 am 4 MacBook Air