A suspension bridge is constructed using 8.0 m steel metal bars during winter when the temperature is 2.0°C. Determine the required spacing between the bars, such that they just come into contact (no compression) during the summer when the temperature is 42.0°C.

A 15.0 cm long metallic stick made of aluminum is placed in a temperature-controlled chamber at 15 °C. The stick is inserted between two fixed jaws, but it is found to be 35 μm shorter than required to fit perfectly. What temperature should the temperature-controlled chamber be so that the stick just fits between two fixed jaws?

A steel bridge spanning a river experiences a temperature variation ΔT throughout a summer day. The bridge has a length of 75 meters at the coldest time of the day. Its length increases by 2.0 cm at the hottest time of the day. Calculate the temperature variation ΔT.