Question

(I) The Eiffel Tower (Fig. 13-31) is built of wrought iron approximately 300 m tall. Estimate how much its height changes between January (average temperature of 2°C) and July (average temperature of 25°C). Ignore the angles of the iron beams and treat the tower as a vertical beam. Ignore effects of Gravity (I) A concrete highway is built of slabs 12 m long (15°C). How wide should the expansion cracks between the slabs be (at 15°C) to prevent buckling if the range of temperature is from-15 C to 50C Q2. (III) A sealed test tube traps 25.0 cm3 of air at a pressure of 1.00 atm and temperature of 18°C The test tube's stopper has a diameter of 1.50 cm and will "pop off" the test tube if a net upward force of 10.0 N is applied to it To what temperature would you have to heat the trapped air in order to "pop off the stopper? Assume the air surrounding the test tube is always at a pressure of 1.00 atm. NB: Pressure- Force/Area Q3 (II) A certain car has 14.0 L of liquid coolant circulating at a temperature of 93 °C through the engine's cooling system. Assume that, in this normal condition, the coolant completely fills the 3.5-L volume of the aluminum radiator and the 10.5-L internal cavities within the aluminum engine. When a car overheats, the radiator, engine, and coolant expand and a small reservoir connected to the radiator catches any resultant coolant overflow. Estimate how much coolant overflows to the reservoir if the system goes from 93°C to 105 C. Model the radiator and engine as hollow shells of aluminum. The coefficient of volume expansion for coolant is-410x 106/Co

Answer 1