(7) An automobile fuel tank is filled to the brim with 45 L (12 gal) of gasoline at 10°C. Immediately afterward, the vehicle is parked in the sunlight, where the temperature is 35°C. How much gasoline overflows from the tank as a resultof the expansion? (Neglect the expansion of the tank.) (8)) On a day when the temperature is 20°C, a concrete walk is poured in such a way that its ends are unable to move. (a) What is the stress in the cement when its temperature is 50°C on a hot, sunny day? (b) Does the concrete fracture? Take Young's modulus for concrete to be 7.00 x10' N/m2 and the compressive strength to be 2.00x 10 N/m2. -40 (9) A pair of eyeglass frames are made of epoxy plastic (coefficient of linear xpansion = 1.30x10 ºC-'). At room temperature (20.0°C, the frames have circular lens holes 2.20 cm in radius. To what temperature must the frames be heated if lenses 2.21 cm in radius are to be inserted nto them? (10) A cylinder with a movable piston contains gas at a temperature of 27.0°C, a volume of 1.50 mº, and an absolute pressure of 0.200 x10- Pa. What will be its final temperature if the gas is compressed to 0.700 m3 and the absolute pressure increases to 0.800 x105 Pa? f
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